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].

The Event Plots product is a suite of plots that are automatically generated following all global M6.0+ earthquakes (M5.0+ for continental US). The plots use all open broadband data available at the IRIS DMC at the time the product was generated. For more information on Event Plots visit the Event Plot product page.

Plot types are:

• Station maps:
  Basic station map and additional equi-distant & azimuthal maps with colors representing first P-arrival (P/Pdiff/PKP) signal to noise ratio.
• Global body wave record sections:
  Produced using various data sets (all IRIS DMC data/GSN) and are 'combed' to show the most even distribution of stations that meet a minimum signal to noise ratio criteria.
• Phase aligned record sections:
  Produced using all available IRIS broadband data and are 'combed' to show the most even distribution of stations that meet a minimum signal to noise ratio criteria. Records aligned on P, plot velocity, while records aligned on S and SKS plot displacement.
• USArray body & surface wave record sections:
  Body wave record sections are combed and show BH data. The surface wave plots show combed USArray LH data filtered between 20-125 sec and share the same amplitude scaling for all three vertical, radial and transverse components. The enhanced record sections use the same traces, but display the amplitudes using a nonlinear color scale, which can show a wider dynamic range of amplitudes.
• Virtual array P-waves & vespagrams:
  First P arrivals aligned using multi-channel cross correlation and vespagrams are shown for all data from a virtual regional network formed from all available stations within a region. Virtual arrays are: TA=central US, mostly USArray data, UW=Pacific Northwest, CA=California and SW US, AK=AK and AV networks in Alaska, AU=Australia, EU=central/western Europe.
• Global body wave stacks:
  Generated by stacking of envelope functions in distance bins. The envelopes are mean pre-Pwave noise removed, square-rooted and linearly stacked, and weighted nonlinearly by the number of contributing seismograms in order to more evenly illuminate the entire wavefield.
• P-wave coda stacks:
  Envelopes of P-wave data from 30-95* are stacked in azimuthal and distance bins. For the largest earthquakes, the azimuthal pattern can indicate rupture direction. Coda durations have been shown to correlate with depth. For large earthquakes, the stack of all bins (red line) can often provide a rough estimate of the rupture duration and character (e.g. single event vs doublet). Travel time anomalies, smoothing of the envelopes, and sometimes depth phase interference will broaden the stack such that even an impulsive M6.0 event may appear to have a ~10 sec duration before the characteristic coda decay sets in.

This product is automatically generated without human review.

The page displays information for individual Event Plot suites.

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