About SPUD

SPUD Version 3.0

The Searchable Product Depository (SPUD) is the IRIS DMC's primary data product management system. Complementing the DMC's SEED and assembled data archives, which contain time series recordings, the SPUD system primarily contains derivative data products of other types (images, movies, etc.) created either at the DMC or by members of the community.

For users SPUD is the query and access point for these products. The web interfaces allow users to search for products using customized queries across product and event details. Users can search across all product types at once or within specific product types. SPUD also has web service interfaces for programmatic discovery and access to the data products.

If any products from SPUD are used in your research please be sure to cite the identified author of the product and the IRIS DMS [Citation Information].

About Ground Motion Visualization Products

The USArray Ground Motion Visualization (GMV) illustrates how seismic waves travel away from the earthquake location by depicting the recorded wave amplitudes at each EarthScope/USArray station location using colored symbols. For more information on GMVs visit the GMV product page.

Two types of GMVs are produced:

  • Vertical-component GMV:
    Produced for US events of magnitude 5.5 or larger and global events of magnitude 6 or larger. The symbol colors represent the amplitude of the vertical ground motion, as detected by the station's seismometer.
  • 3-Component GMV:
    Produced only for events with magnitude 7 and larger use 'tailed' symbols to show direction and amplitude of the normalized horizontal motion. Symbol colors also represent the amplitude of the vertical ground motion, as detected by the station's seismometer.

This product is automatically generated without human review.

Citing Ground Motion Visualization Products

If you use GMVs in publications, please cite:

Trabant, C., A. R. Hutko, M. Bahavar, R. Karstens, T. Ahern and R. Aster (2012), Data products at the IRIS DMC: stepping-stones for research and other application, Seismological Research Letters, 83(6), 846:854. doi: 10.1785/0220 120032

Credits:

— Chuck Ammon, Professor of Geosciences at Penn State’s original concept and visualizations. Read more
— Bob Woodward at IRIS - adapted the visualization code to MATLAB

GMV Help

The page displays information for individual Ground Motion Visualizations.

USArray GMV for MI 8.0 NEAR COAST OF NORTHERN CHILE icon
Event
Date-Time (UTC): 2014-04-01 23:46:47
Location: NEAR COAST OF NORTHERN CHILE
Latitude, Longitude: -19.610 °, -70.769 °
Magnitude: 8.1 MW (GCMT)
Depth: 25.0 km
Author: US
Catalog, Contributor: NEIC PDE, NEIC COMCAT
Related Products:
Product Trigger Origin
Date-Time (UTC): 2014-04-01 23:46:45
Location: NEAR COAST OF NORTHERN CHILE
Latitude, Longitude: -19.630 °, -70.863 °
Magnitude: 8.0 MI (NEIC)
Depth: 10.0 km
Author: NEIC
Catalog, Contributor: NEIC PDE, NEIC ALERT
Vertical-component GMV (USArray Transportable Array)



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3-Component GMV (USArray Transportable Array)



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Great Circle Path
Legend: Event GMV Reference Station       GMV Coverage - Great Circle Path
Array Event Location (azimuthal equidistant projection)


 
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