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].

Screen Help

Screen help provides context sensitive help on SPUD query and detail pages.

SPUD: The Searchable Product Depository icon
Data Products
All Event Based Products

The Event Based Products search allows searching for products directly associated with a single event. Events may be selected by location, time and magnitude.

Earth Models

A repository of Earth models with the aim of providing the research community with access to various tomographic models, visualization tools for model preview, facilities to extract model data/metadata and access to the contributed processing software and scripts.

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Event Plots

A comprehensive suite of station maps, record sections, vespagrams and coda stacks generated shortly after events using all available, three component broadband data at the IRIS DMC for earthquakes larger than magnitude 6.0.

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Ground Motion Visualizations

Visualizations of real data showing how seismic waves sweep across the North American network of seismic stations for which data are collected and served in real time at the IRIS DMC. Watch how seismic waves from earthquakes in the US and around the world cause the ground to move at each seismometer location.

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Back Projections

The Back-projection product shows the beamformed time history and location of coherent short period P-wave energy generated by all modern large M6.5+ earthquakes observed at three regional arrays and across the Global Seismic Network.

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Exotic Events

The Exotic Seismic Events Catalog (ESEC) holds information on non-earthquake seismic sources such as landslide, debris flows, dam collapses, floods, and avalanches that generate seismic signals but are rarely included in common earthquake catalogs.

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Surface-Wave Radiation Patterns

The Surface-Wave Radiation Pattern product displays the azimuthally-varying, frequency-dependent amplitudes of Rayleigh and Love waves that radiate from an epicenter.

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Animations and figures of aftershocks automatically generated following large global earthquakes (Mag > 7).

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Infrasound Events

The TA Infrasound Reference Event Database (TAIRED) is a user-supported evolving database that serves as a reference event depository where researchers can contribute event and find samples of infrasound events for their use.

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Shear Wave Splitting Measurements

The shear-wave splitting (SWS) databases data product provides the geosciences community with an easy access to two published databases:

The Géosciences Montpellier SplitLab’s Shear-wave splitting database (...more)

The Missouri University of Science and Technology (Missouri S&T) shear-wave splitting database for western and central United States (...more)

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Continuous Envelope Functions

A collection of continuous envelope functions to search for tectonic tremor and for data quality analysis. Envelope functions are computed automatically by the Earth and Space Sciences Department of the University of Washington utilizing selected portions of the IRIS DMC waveform archive and are distributed by the IRIS DMC.

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Earthquake Energy

Earthquake energy and rupture duration are estimated by integrating P-wave energy from a global distribution of stations from 25-80 degrees distance following all Mw 6.0+ earthquakes with a GCMT moment tensor.

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The IRIS DMC archives and distributes 1D normal mode & 3D SEM synthetic seismograms from the Global ShakeMovie project.

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Source Time Functions

Point-source synthetic seismograms are used along with vertical component recordings of short-arc Rayleigh waves (R1) from GCMT Mw7.0+ earthquakes to calculate source-time functions (STF) at GSN and other stations.

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Moment Tensors

Global Centroid-Moment-Tensors from the GCMT Project at Lamont-Doherty Earth Observatory. Initial quick-CMT solutions are available within minutes of an event and are later updated to full GCMT solutions when updates arrive. The download button gives users the full NDK format solution.

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Magnetotelluric Transfer Functions

USArray magnetotelluric transfer functions calculated from USArray MT stations by Oregon State University. These define the frequency dependent linear relationship between components of electromagnetic (EM) field variations measured at a single site.

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Event Bulletins

The DMC archives phase arrivals from the USArray Array Network Facility in addition to other DMS sources. The event bulletins are added to the DMC's event tables, making them available via the standard event query interfaces. The original submissions are also available as products.

WWSSN Film Chips

The World Wide Standardized Seismograph Network (WWSSN) operated 120 seismic stations covering every continent beginning in 1961. Scanned images of data from this network are available from SPUD.

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The IDA division of the IRIS Global Seismic Network performs calibrations of their instruments at various times. These calibrations are used primarily to validate that the response metadata matches the actual response of the instrument.

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Station Digests

The Array Network Facility (ANF) generates a final report, or Station Digest, for each USArray Transportable Array station after it has been decommissioned. These reports are available here.

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All Products

The All Products search allows searching for products using location and time criteria. Products without location information can optionally be included in the results.