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 Source Time Function Products

Point-source synthetic seismograms (theoretical Green's functions) are used along with vertical component (LHZ channel) recordings of short-arc Rayleigh waves (R1) from M7.0+ earthquakes to calculate source time functions at GSN and other stations. STFs are estimated using a simple two-source forward modeling approach by sweeping through the parameter space of two smoothed triangle and/or trapezoid functions of various widths, offset and amplitude and retaining the best fitting solution.

For more information on R1 source time functions visit the product page.

This product is automatically generated without human review.

Citing Source Time Function Products

If you use Source Time Functions in publications, please cite according to the instructions at:



Charles Ammon generously provided the time-domain iterative deconvolution portion of the code used. Luis Rivera generously provided the normal mode synthetic seismogram codes used. Results can be very sensitive to pre-processing, which neither C.A. nor L.R. contributed to.

When citing this Source Time Function page please use the Digital Object Identifier (DOI):


Source Time Function Help

The page displays information for individual Source Time Functions.

Source Time Function for MWW 7.8 SOUTH ISLAND, NEW ZEALAND icon
Date-Time (UTC): 2016-11-13 11:02:59
Latitude, Longitude: -42.725 °, 173.065 °
Magnitude: 7.8 Mww (us)
Depth: 22.0 km
Author: at,us
Catalog, Contributor: NEIC PDE, us
Related Products:
Product Trigger Origin
Date-Time (UTC): 2016-11-13 11:02:56
Latitude, Longitude: -42.757 °, 173.077 °
Magnitude: 7.8 MWW (US)
Depth: 23.0 km
Author: US
Catalog, Contributor: NEIC PDE, NEIC COMCAT
R1 surface wave STFs

Product Download
FilenameDescriptionFile Type
2016_11_13_11_02_56_R1STFs_stationfigs.zipZip file of SAC file + figures of individual station data+syn+STFsapplication/zip
2016. file of individual station CCCs and durationstext/plain