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
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
This product is automatically generated without human review.
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
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.
The page displays information for individual Source Time Functions.