The COSMOS Virtual Data Center Fact Sheet http db by dahntayjones


									                            The COSMOS Virtual Data Center Fact Sheet 2007

The COSMOS Virtual Data Center                    In 2000, FEMA estimated that the
(VDC) is an unrestricted web-based                annual losses due to earthquakes for the
search engine for access to worldwide             U.S. alone was $4.4 billion. Strong-
earthquake strong-motion data. It                 motion time histories acquired by
provides an interactive resource for              seismic networks are critical to earth
research and practicing earthquake                scientists for understanding the physics
engineers, earth scientists, and                  of the earthquake process and to
government and emergency response                 improve our ablity to predict ground
professionals. The VDC is the only on-            shaking from future earthquakes. The
line strong-motion resource continuing            data of observed ground motions are
to expand and significantly improve the           important to engineers for designing
accessibility and the use of strong-              safer structures, ultimately reducing the
motion records worldwide.                         cost of earthquakes and loss of life.
                                                                                                  The heavily damaged Acorn/Mastagni Bldg,
                                                                                                  Paso Robles, CA, after the 12/22/2003 San
                                                                                                    Simeon earthquake. (Photo by Janise
Users have a wider range of access                                                                             Rodgers, USGS).
options than any other on-line source;
using the VDC, they may search for
specific characteristics of the data, view                                                        Search for Data on the VDC
                                                 All of the records from the large legacy
data in a geographical perspective,
                                                 dataset distributed by the National              The Map Interface displays earthquakes
preview records, compare recorded data
                                                 Geophysical Data Center (NGDC) are               and stations on a world map, which
with design spectra and retrieve the data
                                                 currently being added to the VDC. The            users may reconfigure by entering
and metadata of most interest to them.
                                                 VDC continues to incorporate all data            latitude and longitude ranges, zooming
                                                 available from the USGS and CISN                 in, clicking on a station or earthquake
Data available via the VDC                       with magnitude > 5.0 in highly seismic           symbol to transfer to station or
                                                 areas and > 4.5 in other areas. The VDC          earthquake pages, or highlighting the
In the last few years substantial data           incorporates all data from the Japanese          stations reporting a selected earthquake.
sets representing earthquakes with               K-Net and Kik-net networks with a pga
magnitude > 5.0 have been added:                 of at least 0.1g. Recent data sets from          The Earthquakes Page lists earthquake
ChiChi, Taiwan; all New Zealand                  these sources include the 2004                   name, magnitude, number of stations
records from 1966-2006; the NSF-                                                                  and data provider for all earthquakes
                                                 Parkfield and Niigata-Chuetsu
funded Guerrero array on the Pacific                                                              available through the VDC by region,
                                                 earthquakes and aftershocks. The VDC
Coast of Mexico, as well as smaller but          has also recently added data for the             with a drop-down list of regions at the
seismically important data sets from             Kobe 1995 earthquake. The VDC is                 top of the page for quicker navigation.
Central Asia, Turkey and India. As a             currently in negotiations with the               The Stations Page lists owner and
measure of the international reputation          Geological Survey of Canada and the              station name for all stations available
of the COSMOS VDC, the Institute of              European Strong-Motion Database to               through the VDC by region, and also
Geological and Nuclear Sciences Ltd,             link to their datasets through the VDC.          has a drop-down list of regions at the
New Zealand, and the Department of               Thus the VDC can be expected to                  top of the page.
Earthquake Engineering, Indian                   continue its exceptional expansion and           The Basic Search Page allows the user
Institute of Technology, Roorkee, India          its service to the earthquake research           to enter the most common parameters.
requested that their accelerograms and           community.                                       The user may also tailor the output to
metadata be stored and distributed                                                                reflect station information only,
directly from the VDC.                                                                            earthquake information only, or all
                                                                                                  data, for the result set.
                Increase In Data Available Via The COSMOS VDC                                     The Advanced Search Page allows the
                                                                                                  user to query and recover almost every
                                     Sept 2001         Jan 2007        Increase
                                                                                                  field in the database. The user may
            Earthquakes                    199              623          213%                     select an html table or a station page as
            Stations                     1,744            3,555          104%                     the output of the advanced search, or
            Accelerograms              11,537            36,248          214%                     download the metadata as an rtf file.

                            The COSMOS VDC is currently supported by funds from COSMOS, the USGS and the CGS.
Preview Data via the VDC
Each html search result page has a link
to a new map of the results of the                               35000
search, a link to each station and
earthquake represented, to acceleration                          30000

plots for each station, and to both                              25000
logarithmic and linear plots of response
spectral acceleration. The user may                              20000

configure the units in which the spectra                         15000
are displayed, scale the spectra and
enter parameters to define the shape of                          10000

overlaid design spectra that correspond                           5000
to several building code standards.
                                                                         J FMAMJ J ASOND J FMAMJ J ASOND J FMAMJ J ASOND J FMAMJ J ASOND J FMAMJ J ASOND
Download Data via the VDC                                                     2002            2003            2004            2005            2006

There are 3 ways to download data:                            From 2001 to 2006 the use of the COSMOS VDC has increased considerably.
• on many Earthquake Pages, there is                          The number of files downloaded has grown from a few hundred per month to
    a link to a zipped archive of files                       peak of almost 34,000 in 2006. Sharp peaks in 2003, 2005 and 2006 reflect
    for that event, allowing the user to                      downloads from major new datasets.
    download all data for the selected
• on the Download Page, users may                   accelerograms reside with the source                         In Development
    select individual files for                     agencies. At the time of the user’s
    downloading.                                    request data files are pulled in real time                   COSMOS is currently developing a
• on the Download Page, users select                from these agencies that collected and                       simplified, comprehensive, and
    files and receive them as a set of              archived the data. Thus, users will                          extensible strong-motion format that is
    zipped files containing up to 30                always receive the most recent and                           both easily computer-parseable and
    data files each, together with a log            authenticated copy of data available.                        human-readable. This format will
    of files included.                                                                                           facilitate metadata extraction for the
                                                    When you use this data in your                               VDC database, website plotting of all
The VDC is virtual in that the                      publications, please acknowledge both                        data products and conversion of files to
                                                    COSMOS and the data owners.                                  various formats including xml, Excel
                                                                                                                 and MatLab compatible files.

                                                                                                                 During the spring of 2007 the VDC will
                                                                                                                 become part of the new National Center
                                                              ACoE                                               for Engineering Strong Motion Data, a
                                                              USBR                                               joint venture between the USGS (ANSS
                                                              Utilities                                          and NSMP) and CGS (SMIP) with
                                                              Universities                                       centers of operation in Sacramento and
                                                              Consortia                                          Menlo Park, CA. The VDC provides
                                                              Private                                            search resources and highly valued
                                                              Japan                                              access to international data that
                                                              Taiwan                                             complement the US data in the Center.
                                                              New Zealand                                        COSMOS will continue to provide
                                                              India                                              guidance and advocacy for the VDC.
                                                              Ctl & So America                                        The VDC provides a one-stop
                                                              Turkey & Armenia
                                                                                                                     shopping approach for finding
                                                                                                                      strong-motion data collected
                                                                                                                         anywhere in the world.

   Users download data from a variety of sources through the COSMOS VDC. This chart
   represents the large and diverse number of data providers whose data were accessed
   in 2006. Although the USGS and CGS contributed the largest shares, a substantial
   number of files were downloaded from Japan (K-Net and Kik-net), U.S. universities
   and Taiwan.

                            The COSMOS VDC is currently supported by funds from COSMOS, the USGS and the CGS.

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