Documents
Resources
Learning Center
Upload
Plans & pricing Sign in
Sign Out

l - Alaska Division of Geological _ Geophysical Surveys

VIEWS: 2 PAGES: 21

  • pg 1
									1   ti
         t   t   ,
                 .
                 h~niqq:L!/-h i \,I
                         i i S DL,b . t * i ' i, v L $ l        I
                                                           Eid-l*I ) (          -l=[iE i ~ ~ 1 4 [ - ~
                                                                                      l
                                              "            p    m        m ' : :*
                            GEOLOGIC

                      PRELIMINARY GE
                          COLLEGE OBSERVATORY
*                           FAIRBANKS, ALASKA

*   SEPTEMBER 1980                      OPEN FILE REPORT                                  80-3001
                      ORDER OF CONTENTS


Explanation of Data & Reports

Magnetic Activity Report

Outstanding Magnetic Effects

Principal Magnetic Storms

Preliminary Calibration Data & Monthly Mean Absolute Values

M3gnetogram Hourly Scalings

Sample Format for Normal & Storm Magnetograms

Normal Magnetograms

Storm Magnetograms (When Normal is too disturbed to read)
    THIS REPORT WAS PREPARED UNDER THE DIRECTION OF JOHN B, TOWNSHEND, CHIEF OF THE COLLEGE OBSERVATORY
    WITH THE ASSISTANCE OF OBSERVATORY STAFF EMBERS J ,E, PAPP, E,A. SAUTER, AND S , P , TILTON, AND I N
    COOPERATION WITH THE GEOPHYSICAL INSTITUTE OF THE UNIVERSITY OF ALASKA. THE COLLEGE OBSERVATORY I S
    A PART OF THE BRANCH OF ELECTROMGNETISM AND GEOMAGNETISM OF THE U,S, GEOLOGICAL SURVEY,

                                       COLLEGE OBSER'!A.T3RV   PXELIMINARY GEDMAGNETLC DATA



                        INTRODUCTIGN                                                        OBSERVATORY LOCATION

     The preliminary geomagnetic data included here is                            The College Observatory, operated by the U. S.
made available to scientific persomel and crganizatiocs,                     Geological Survey, is located at the University of
as part of a cooperative effort aLd on s data exchange                       Alaska, Fairbanks, Alaska. It is near 3he Auroral
basis because of the early need by some users. To                            Zone and the northern limit of the world's greatest
avoid delay, all of the data is copied from origins1                         earthquake belt, the circum-Pacific Seismic belt.
forms processed at the observatory; therefore it should                      Although the observatory's basic pera at ion is in geo-
be regarded as preliminary. Inquiries about this report                      magnetism and seismology, it cooperates with other
3r about the College Observatory should be addressed to:                     scientists and organizations in areas where the f n c i l -
     Chief, College Observatory                                              ity and personnel can be of service.
     U.S. Geolopical Survey                                                       The observatorg is one of three operated by the
     Yukm Scive on West Ridge                                                USGS in Alaska. The others are located at Barrow and
     Fairbanks, Alaska 99701                                                 Sitka.
                                                                                  The position of the observatorj site is:
                 'r
     Requests fo copies of the magnetograms except for                                                       .
                                                                                   Geographic latitude... . . . .61°51 .6'N
+,hecurrent month silculd be addressed i0:                                         Geographic longitude.. . . . . .l47%.2'W
     .;lorld 3ata Center A-NOAA                                                                                  .
                                                                                   Geomag~etlclaSitude... . . .+64.63
     Environmental Zeta Service                                                    Geomagnetic longitude.. . . . .+256.5'
     3oulder, Colorado 80302                                                       Elevation .................. 200 meters

                                                          GEOMAGNETIC DATA

      Normal, Storm, and Rapid Run mgnetogrms and                            Selected Pheronena h Outstanding Magnetic Effects
appropriate calibration data are processed daily at                                Prior to January 1. 1976. the Normal & Ranid
                                                                                                   - .
the observatorg and are available for snalysis or                            Run records were reviewed at the observatory fbr
copying. Also available are mean hourly scalings,                            selected mgnetic phenomena and the events identified
:(-Indices, selected magnetic phenomena reports, and                         were forwarded 50 the IUGG Commission on hgnetic
an a real-time basis are recordings from a 3-compo-                          Variations and Disturbances. This was discontinued
nent finx~atemagnetometer and F-component proton                             0x1 January 1, 1976, but a report on Outstanding
magnetometer.                                                                ,Magnetic Eff'ects is prepared nlonthly for this report.
!kgnetic Acti7ritj                                                           Principal Magnetic Storms
       The K-Index. The K-Index is a logarithmic measure-                         Gradual and sudden commencement mametic distur-
~ e n t the ranee of the most disturbed component (D or
       of                                                                    bances with at least one K-Index of 5 0 greater, which
                                                                                                                    ;
:i)>f the geoma&ietic field for eight interGals Segirning                    are believed to be part of a world-wide disturbance,
                         ...
2000-0309, 0300-0600 2100-2400 UT. It is 2 measure 3r'                       are classified as principal magnetic storms. The time
 ,e
'h difference between the highest snd lowest aevia3ion                       of the storm beginniq and end-lng;direction and
from a smoozh curve o be expected : a component 3n a
                      :              '
                                     or                                      amplitude of sudden commencements; period of maximum
~,agnezical;y quier. day, within s three hour inserval.                      activity; and storm rawe are reported. Monthly reports
       The Equivalen: hi17 Amplitude, AX. The K-Index                        of these data are forwarded to the World Data Center A
is 2onverTed int.2 an equivalent ranye, ak, :?t-Jch Is near                  in Boulder, Colorado.
the -enter of the limiting gamm razges         a given R .
The aversge ofhthe eight values is eailed equivalent                         ,%gnetogram Hourly Scalings
daily amplitude AK. The unit l0y has been chosen so as                             lMagnetogram hourly scallngs are averages for
rotto zive the illusion of an accuracy not justified.                        successive periods of one hour for the D, H, and Z
       The schedde for converting g m a range to K, and                      elements. The value in the column headed "01" is the
K :o ak is as follows:                                                       average for the hour beginning 0000 and endir-g 0100.
        G m a Range    K - Index        -
                                        ak*                                  Note that the values on the scaling sheets are in tenths
            0 < 25          0            0                                   of mm with the decimal point omitted. 'The user of these
           25 c 50          1            3                                   scalings should keep in mind that the tabular values are
           TO . 130
               :               L         7                                   hourly means and if he is interested in the detailed
         LC30 < 230         3           15                                   morphology of the mapnetic field, he should refer directly
         2%   < 350         4           27                                   to the magnetograms.
          359 < 6013        5           48
         620 <1WO           6            3
                                        10                                   Magnetoajrams
        1300 <1650          7         140                                          The normal magnetsgrms in this report are repro-
        1650 <2500          5         24O                                    duced at about me-third the size of the originals. Pre-
        2500~               9         400 (1C-f)                             liminary base-line values and scale values adopted for
                                                                             use with the clriginal magnetograms are included. For days
                                                                             when the ,magnetic field 13 $00 disturbed for the Normal
     The ,Uaynetic Daily Character Figure, C. 70 each                        nagnetogram to be readsble,Storm magnetograms are repro-
Universal day a character is assigned on the basis                           duced.
C=O, if it is quiet; C=1 if it is moderately
disturbed; C=2 if it is greatly disturbed. The                               Absolutes, Base-lines, and Scale Values
method used to assign characters at the College                                   To determine the absnluce value of the magnetic
Observatory is based on AK as follows:                                       fi.eld from the hourly means or from point scalings the
                                                                             following equations should be used:
                                                                             3=9D+d*SD;H=&J+h*%J,; Z=BZ+z'SZ
            1 1 s 550       1                                                where 3 , H, ana Z are absclute values;
            50+             2                                                BIJ, aFi and 3 p r e base-line v3l7ues;
     Routine assiment of C was discon2inued at                               $5, SF and $2 9re scale values:
College on January 1, 1976.                                                  and d, h, and z are scalinqs in millimeters.
                                                                                                                                                                        a

               76-133                                    U. S. DEPARTMENT O F COMMERCE          OB~ERVATORY
                           N A T I O N A L O C E A N I C AND ATMOSPHERIC ADMINISTRATION
19-72]
                                                                                                                    COLLEGE, ALASKA
                                   MAGNETIC ACT IVlTY                                           MONTH A N D Y E A R
         (Greenwich c i v i l time, counted from midnight to midnight)                                              SEPTFMBER 1980
                                                   K-INDICES
                                                                                                                                      T I M E S C A L E OH

 DATE                          m
                               7       N

                                       b
                                                  -
                                                  -
                                                  A
                                                   m
                                                           -
                                                           m

                                                               A
                                                                   -

                                                                   -
                                                                         w
                                                                             N
                                                                             ~       L    SUM
                                                                                                                                     MAGNETOGRAMS


               $       g       g       o                   7                 N
                                                                                                       AK                                          20        mmhr
                                                                                                       -

    1         3       2       3       0           0       0        0         0            08             05                  S U D D E N COMMENCEMENTS

              1       1       9       0           2       0        0         0            04             02                      d             h             rn

    3         1       0       0       1            3       5       5         3            18             17
    a         3       1       2       3           3       1        1         1            17             10
    5         1       4       4       4            3      5        4         2            27             23

    6         2       2       2       1           2       3        1         1            14             07
    7         2       2       1       4           1       2        1         2            15             08
    8         2       1       1       4           2       2        1         1            14             08
    9         1       1       2       3           4       3        1         1            16             10
   10         2       1       0       0           0       1        1         1            06             02

   11         1       1       0       3           3       3        1         0            12             07
   12         0       4       5       4           4       6        2         3            28             29
   13         3       4       4       6           6       4        2         1            28             27
   14         2       2       1       2           1       1        0         2            11             05
   15         2       2       2       4           4       3        2         1            20             13

   16         0       2       3       3            1      0        3         2            14             08
   17         2       1       4       5            5      3        1         2            23             20
   18         1       1       4       2            0      1        1         1            11             06                    POSSIBLE         SOLAR-FLARE
   19         1       0       0       4            4      1        1         1            12             08                        E F F E C T S B A S E D ON
                                                   1      2        0         0                           04                     I N S P E C T I O N O F GRAMS
   20         3       2       1       0                                                   09                                        A L O N E (WITHOUT
                                                                                                                                 REFERENCETODATA
                                                                                                                                 FROM O T H E R SOURCES)
  21          0       0       0       0            0       0       0         0            00             00
  22          0       0       3       4            5       3       1         0            16             14
  23          1       0       0       4            1       0       1         0            07             05
  24          0       0       2       2            0       0       0         0            04             02                   BEGIN                          EN0


  25          1       2       3       3            1       2       0         0            12             06             d       h r n              d         h      m

  26          0        0      2       4            3       0       0         0            09             06
  27          0        0      0       1            1       1       1         1            05             02
  28          1        0      0       0            4       3       0         1            09             06
  29          1        0      1       0            0       2       2         1            07             03
  3o          2        1      0       0            0       0       1         0            04             02
  31

                                                                                                                       -- --                                            -




  K SCALE USED:                                                D                      H              z
     LOWER LIMIT FOR K          = 9. ..... ...          683.8                     321.7                              (mm)

    CURRENT SCALE VALUE              .... ....            3.75                      7.81                             (Y/mm)
     LOWER LIMIT FOR K          =9   ........          2560                      2510                                (to    ncarest    107)
 SCA L l N G S AND C O M P U T A T I O N S H A V E B E E N C H E C K E D .


                                                            APPROVED             J O H N B . TOWNSHEND , CHIEF, COLLEGE OBSERVATORY
                                                                                                  O B S E R V E R IN C H A R G E

N O A A F O R M 76-la3     S U P E R S E D E S C a t 5 FORM 818                                  *   U.S.   G O V E R N M E N T P R I N T I N G OFFICErlQ7EI-761-857
                                                   --

                                                            TO                             SCALE V19IIIE                     BASELRiE
                                                                                                                   -
                                                  2400 0 - 9-3-80 I.&'AM 1 ~
                                                         T                                             . ~ T / M M




        z                                                                                                                               ,-




                                                            STORM MAGtiEmRAPB
              I                          PERIOD                              I                              A mx 1
                                                                                                           c L PCm




I                                                       RAPID RUN       UAGNETCGRAPE                                                         1
I            I                          PERIOD
                                                                                              -
                                                                                                           CALIBRATION




                                                  M o m MEAR      ABSom          VALUES*

                      D                                             H                                                    Z
                  0
                             h                               1301~                                         5 97 9
                                                                                                            5
    +   CCMRYlXD PRW TEA Q l I E X E T .DAYS DUKUG MOAPB.
f 0-U   16- 106                                                                                                                                                                                                                                       n l
                                                                                                                                                                                                                                      u.5. a l r ~ ~ or r a n ? r m 0 8 s ~ .           YEAR   U ~ H T U ELE-
                                                                                                                                                                                                                      L a ~ l n ~ 3 r . ls v . n * ,      *.ul.li.      Ol*,.lm                          YV*T
                                                                                                     MAGNETOGRAM HOURLY SCALING%                                                                                                                 0.-.Yr      ram-*?*!     tea,,,
                                                                                                                 (UNIVERSAL TIME]                                                                                                                   or*vrr. ca B ~ I Z ~                               1
          V e l u r s I r e in Ienahs 01 mm. a n d .rr
          S h r l n l m ~ rrnttrctionn   h*..
                                                        m r r r m t r . f r r r u r r t - . i r e periods *I onr hour hrAinwinE .Imidninha, llnur n l o l lur.1 dmy ( ~ % u . T .i a h m ~ r _ l F n l t h c -z--uni.r,srl
                                                berm applird. NeCmtirr . s l u r s mrr in l e d , rhth minu. mixns s h o r n .
                                                                                                                                                                                   )                                                              dmy.                             CO   no      SET        11




                                                                                                                                                                                   Imulry record.
COLLEGE. A M K A

SEP   5. inm                                          SEP   6.1880                                                                             -.

                                                                                          ----+,~",,*+.      i            '
                                                                                                                          .        I
                                                                                                                                   '       <
                                                                                                                                                    ,
                                                                                                                                                    8




                                                                                                                                                    +



                                                                                                            --:-          ;            I
                                                                                                                                                            ,. --

                                                                                                ,            I            !
                                                                                          .     ,            ;            I        ;

COLLEGE.ALASKA               I   '       1

SEP   6.1880                 1


'4




-     1:-
       '
                                     <




                                                                                           12       :                                  16
                     m                                                                              I            '
                                                            '        ,

                                                                             --                     1       _I



                                                     ..
                                                                                                                     .   --
                                                                                                    I                         I

                                                                                                    I            I            I




               ..-                   ,       1
                                                                I
                                                                         1                              I
                                                                                                                                               I        I




           l             l       ~               i        i I ! , I I             I l l                                           I I ,
COLLEGC,ALASKA
SEP 8,18801
                               ~
                               1
                                       ,
                                                         5EP 10, 1 9 8 0
                                                                            8       ,



                                                                                    ,                  I           I
                                                                                                                           '

                                                                                                                           >
                                                                                                                                   ,       #

                                                                                                                                                           I
                                                                                                                                                                I     ,
                                                                                                                                                                      ,           ,            !
                                                                                                                                                                i
                                                                                                                                                                I     : j                  l

                                                                            I
                                                                            I                                                                                                              I




                                                                                                                                                                                      ." .,- -.-- .-
                                                                                                                                                                                                .-
                                                                                                                           1           I           I
                                                                                                                                                                      I
                                                                                                                                                                      I
                                                                                                                                                                                           !


                                                              I I i I I                                                                                         1     I
COLLEGE. ALASKA'
SEP 10, l 9 R O        1
                                                         I t :
                                                         SEP 1 1 . 1980
                                                                                        '
                                                                                        1
                                                                                                               ;
                                                                                                               '
                                                                                                                       I
                                                                                                                       ,
                                                                                                                               0
                                                                                                                               1
                                                                                                                                               )
                                                                                                                                               ,           ,

                                                                                                                                                           ~
                                                                                                                                                               ;I         )
                                                                                                                                                                          :
                                                                                                                                                                                  !
                                                                                                                                                                                  I




                                           I                                                               1           i
                                   I       '
                               I                                                                                                                                                               I


                           I               '
           I       20      I               ,        24            UT.
                                                                                            ...-                       i                                                                   16
                           I       !           ,                                        ,                  8




                               1       ,


                                               --    -


COLLEGE. ALASKA
                                                                                '                  ,
                                                                                                                                       1       1       ;        1     I       1       \,   '\;
SEP 11. 1 9 8 0 1                                                                                                                                               1     i           f            '
       I
       8           ,
                   I




                                                              8         ,
                                                                                                                               .   8


                                                                                                                                                                    magnetogram




                                                         dnslurbana
       I       I
                                                                  --"
   COLLEGE. ALASKA                                                                                                   I                     I
                                                                                                                                                                                                      1              :           1
   SEP 10.       9
                1W
                                                             I
                                                             I       SEP 19. 1980                       1            1
                                                                                                                                           1
                                                                                                                                           I
                                                                                                                                                       '
                                                                                                                                                                                                      i      I,          f




                                                             [                               I                       i                                                                                '

                                                                                                                                                                                                      l1
                                                                                                                                                                                                             I

                                                                                                                                                                                                                 !
                                                                                                                                                                                                                         t

                                                                                                                                                                                                                         l
   -
   v
   +
                                                                                             I,
                                                                                                        1

                                                                                                        i
                                                                                                                     I
                                                                                                                                           i
                                                                                                                                           $
                                                                                                                                                           I

                                                                                                                                                           I
                                                                                                                                                           1
                                                                                                                                                                        8

                                                                                                                                                                        1
                                                                                                                                                                                              '.,-
                                                                                                                                                                                                     ..J-----
                                                                                                                                                                                                    r ;, I
                                                                                                                                                                                                             ,

                                                                                                                                                                                                                 ,           I       ,
                                                                                                                                                                                                                                            4




                                                                                                        I                                                                       -- --
--..
 -.--
                                                                                                                                  -
                                                                                                                                  .
                                                                                                                                  --
                                                                                                                                                                                              - .
                                                                                                                                                                                              - .-
                                                                                                                                                                                               .I-1
   -                                                                                                                                                   B                                             -.,--                       l 6 ..,-



   -
                      20
                              ...                                             U.T            ;                               --                                    .--                         I2

                                                         1                              I    I
                                                             ,                      >
                                                                                        '
                                                 ,       /       j

                                        -,
                                                 : -;        \            ,         I       ..-,
                                                                                               "                                       -, ,~.
                                                                                                                         I              ;                                   I             '
            ,
                -.-
                 <
                                                             i                                                                                                                       ,   ,
                                                             I                                                                                 I               '            ,
                                                                                                            ,            8                     m           ,
                                                                                                                                                                                     8




   COLLEGE,ALASKA                            '
                                                                                                    ,
                                                                                                    ;
                                                                                                                '
                                                                                                                I
                                                                                                                                                   1               :;            '
   SEP 19. 1980                     ,                                SEP 20. 1980




        1             :         :                                                                   I
                                                                                                    I           '1                                                               I
                -..
                 ,
                 I
                          8
                          1
                          ,
                                                                                                                I                                                  '
                                             ,       I

                                                                                                                                                                                                                                 16




                                                                                --..a.             -...
                                                                                                                                       1                                         I
                                                                                                                                                                                 I
                                                                                                                                       i           :                t
COLLEGL. ALASKA                                     I                     ,8   ,
                         i                      I
                                                                               8




-
SEP   77, 1980           I   SEP 28. 1980
                                            1                     '            I




                                                         .
                                                        --



           2     0   1                                       12   !   I        16   1




       I
COLLEGE ALASKA

S E P 2 9 19RO
                                                     II SEP30        1980                                   I
                                                                                                                   I




                      C   --      > '1 -,d,'-
                                                    .i-lr~*I-                                     .         j,
                                                                                                           ll
                                                                                                                                                      I




1
    '-w*-
        /
                -
                                  r-

                                      I
                                                    I                                                       I
                                                                                                            I
                                                                                                                   i    I
                                                                                                                                                                   I   I

                                                                                                                                                                                  -
                              I
                                      I
                                                I    i     ,.-,I
                                                                                                                   I1   I                             I

----I                                                                                                                   1                    I                 ~       :      l
                        20                          24             U1                     4                 8                           12                             16

                                                                                                                   I
                                                                                                                                                                                  -
r                                                                                                                  A




                                                                                                                                                                       I
                                                                                                            I                                                          I
    --                                    -
                                          -                                 -.       --                .-
                                                                                                                   I
                                                                                                                        -   -
                                                                                                                                              I
                                                                                                                                                      .                     - .--.
                -.-
                                                                                                                                                      I                I
                                                     I
COLlFCF ALASKA
5EP 30 1980                               -              OCT       1 1980            -                                              -
                                                    I                                                              ,    I       I
                                                                                                                                                      1            I

A\   J     h
           y -
            %

                                                1   I                            I


                                                                                 1
                                                                                          <


                                                                                          1
                                                                                              I
                                                                                                       I
                                                                                                       1
                                                                                                                                i
                                                                                                                                                      I   -'
                                                                                                                                                  ,+-+---+-
                                                                                                                                                      I


                                                    '
                ..                                                                                     !    I      1            I

u-                                                                                                     I
                                                                                                                                I
                                                                                                                                I
                                                                                                                                             _____
                                                                                                                                                 ,
                                                    I
                      20                            24             UT                     4                                             13                             16




+           I                                       I                                                                                                     I
                                                                                                                                                                       I
                                                                                                                                                                                  4




           I              I
+                   !                 . ,.
                                        .                                                             --    - --
         .:.1
                                                                                                                                             I
                                                                                                       I                                                               I
                                                                                                                                                                       1
           I                                                                                  I
                                          I
                                          i
                                          i       SEP 4   880

                                                                                                                    I
                       I        /
                                                                                                I                   I           (        I   1       1
                                                                '         /                             +                       I
    D
    >                                                                             -
    2   -                                             -
                                                      -              --           -                             -                   +-

                                         I

                   M                     24U t                           A                  8                               7                        16
    2




Z,              -
                -L -
                - A-



                           -             +                          --                ---           --_--
                                                                                                            I
                                                                                                                                    -.
                                                                                                                                     -
                                                                                                                                         I

                                                                                                                                                 -__-
I"
s
4
  "         -      .           -.   .-
                                    -1
                                         I
                                              -
                                                                '         I
                                                                          1
                                                                          ,
                                                                          I
                                                                              ,
                                                                              I

                                                                              I
                                                                                        I   .   i, t i
                                                                                                   i                I
                                                                                                                                I
                                                                                                                                I
                                                                                                                                I
                                                                                                                                         /
                                                                                                                                         ,
                                                                                                                                             '
                                                                                                                                             ,
                                                                                                                                                     I
                                                                                                                                                              ,.
& 1

                                         I                      1
                                                                          I
                                                                              1         ~                               i       i                i        I        ~
        M I L K € GL;                    1                                                                        I       /       I,        :                 I       ,
                                                                                                                                                                                       I

    D         ~    ~ 1 ~                 I i     a   ~                                                                                                            :           ,        1
              #                 !        I

                            1            1           I
                                                                    I     ,           ,
                                                                                                                                                          I               i       I    I
                            1       <                I                                                                                                    I                            ;
    0-                                                                                                                                                   4
                                                                                                                                                         ,-
                                                             I            I           '               I
                                                                                  1
                                                                                  1
                                                                                              i
                                                                                              8       ,
    Z
                                                     I
                                                                                                                                                                                  M




z
s   H   --                                                                        I
E   T
                                                                                              I



                                                                                                              I
                                                                                                              1       1
                                                                                                                              I
                                                                                                                              1         1       1         i       i       l       I
        MXLFGL M W
        SEP 1 6       R83                                           SEP 1 7 880
                                                                                          I       '

                                                         I                                                                                                            ,       8

                            ;       -J   I                                                                                                                                             1
    D                       2


                                             I
    2


                            20                               2IVT                                                                                   11                            16


                  I
                            !
                            I
                                                                                                  :       I
                                                                                                                                      ' i
                            ,

                                                                                                                  !       :       '     I

                                                                              l           ,       l       <

								
To top