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.

Source Time Function Query Help

This page queries for Source Time Function products.

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.

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Event Criteria
Depth (km)
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Query Results: 322 items found
ppPage: 1 of 4pp
Event Time (UTC)Depth (km)Trigger MagLatitudeLongitudeRegion
2021-09-08 01:47:4820.07.016.99-99.78NEAR COAST OF GUERRERO, MEXICO
2021-08-22 21:33:2014.07.1-60.29-24.90SOUTH SANDWICH ISLANDS REGION
2021-08-11 17:46:1465.67.16.45126.74MINDANAO, PHILIPPINES
2021-05-21 18:04:1310.07.334.5998.25QINGHAI, CHINA
2021-03-04 19:28:3119.48.1-29.74-177.27KERMADEC ISLANDS, NEW ZEALAND
2021-03-04 17:41:2555.577.4-29.61-177.84KERMADEC ISLANDS, NEW ZEALAND
2021-01-23 23:36:507.767.0-61.85-55.56SOUTH SHETLAND ISLANDS
2020-07-22 06:12:4210.07.855.10-158.47ALASKA PENINSULA
2020-03-25 02:49:2156.657.548.99157.69EAST OF KURIL ISLANDS
2019-11-14 16:17:4145.147.11.59126.42NORTHERN MOLUCCA SEA
2019-07-14 09:10:5010.07.3-0.53128.09HALMAHERA, INDONESIA
2019-07-06 03:19:5217.07.135.77-117.60CENTRAL CALIFORNIA
2019-05-26 07:41:14109.888.0-5.80-75.30NORTHERN PERU
2019-05-14 12:58:2610.07.5-4.08152.57NEW BRITAIN REGION, P.N.G.
2019-03-01 08:50:41257.427.0-14.68-70.13CENTRAL PERU
2018-12-11 02:26:32164.667.1-58.60-26.47SOUTH SANDWICH ISLANDS REGION
2018-12-05 04:18:0810.07.5-21.97169.45SOUTHEAST OF LOYALTY ISLANDS
2018-09-28 10:02:4310.07.5-0.18119.84MINAHASSA PENINSULA, SULAWESI
2018-09-06 15:49:14608.597.8-18.49179.33FIJI ISLANDS
2018-08-29 03:51:5626.687.1-22.07170.05SOUTHEAST OF LOYALTY ISLANDS
2018-08-21 21:31:42123.187.310.74-62.91NEAR COAST OF VENEZUELA
2018-08-19 00:19:37563.418.2-18.18-178.11FIJI ISLANDS REGION
2018-08-05 11:46:3410.487.0-8.27116.46SUMBAWA REGION, INDONESIA
2018-02-25 17:44:4435.07.5-6.15142.77NEW GUINEA, PAPUA NEW GUINEA
2018-02-16 23:39:4224.657.216.65-97.65OAXACA, MEXICO
2018-01-23 09:31:4225.07.956.05-149.07GULF OF ALASKA
2018-01-10 02:51:3110.07.617.47-83.52NORTH OF HONDURAS
2017-11-19 22:43:2910.07.0-21.33168.64LOYALTY ISLANDS
2017-09-08 04:49:1735.08.015.03-93.81NEAR COAST OF CHIAPAS, MEXICO
2017-07-17 23:34:1411.77.754.47168.82KOMANDORSKIYE OSTROVA REGION
2017-04-24 21:38:2510.07.1-33.06-72.04OFF COAST OF CENTRAL CHILE
2017-01-22 04:30:24153.88.0-6.27155.12SOLOMON ISLANDS
2017-01-03 21:52:3115.27.2-19.33176.06SOUTH OF FIJI ISLANDS
2016-12-25 14:22:2733.017.7-43.42-73.90SOUTHERN CHILE
2016-12-17 10:51:12103.197.9-4.51153.45NEW IRELAND REGION, P.N.G.
2016-12-08 17:38:4641.07.8-10.66161.33SOLOMON ISLANDS
2016-11-24 18:43:4910.37.011.96-88.84OFF COAST OF CENTRAL AMERICA
2016-11-13 11:02:5623.07.8-42.76173.08SOUTH ISLAND, NEW ZEALAND
2016-09-01 16:37:5830.77.1-37.46179.18OFF E. COAST OF N. ISLAND, N.Z.
2016-08-19 07:32:2210.07.4-55.34-31.94SOUTH GEORGIA ISLAND REGION
2016-08-12 01:26:3616.17.6-22.49173.10LOYALTY ISLANDS REGION
2016-07-29 21:18:25212.47.718.52145.53MARIANA ISLANDS
2016-05-28 09:47:0193.27.3-56.26-27.04SOUTH SANDWICH ISLANDS REGION
2016-04-28 19:33:2635.07.0-16.09167.34VANUATU ISLANDS
2016-04-16 23:58:3719.27.80.37-79.94NEAR COAST OF ECUADOR
2016-04-15 16:25:0610.07.032.78130.73KYUSHU, JAPAN
2016-04-03 08:23:5335.07.2-14.35166.82VANUATU ISLANDS
2016-03-02 12:49:4824.07.9-4.9194.28SOUTHWEST OF SUMATERA, INDONESIA
2016-01-30 03:25:10161.07.054.01158.51KAMCHATKA
2016-01-24 10:30:30127.87.159.66-153.45SOUTHERN ALASKA
2015-12-04 22:24:5410.07.1-47.7485.18SOUTHEAST INDIAN RIDGE
2015-10-26 09:09:32212.57.536.4470.72HINDU KUSH REGION, AFGHANISTAN
2015-10-20 21:52:02127.17.3-14.84167.31VANUATU ISLANDS
2015-09-16 22:54:3225.08.3-31.56-71.74NEAR COAST OF CENTRAL CHILE
2015-07-18 02:27:3310.07.5-10.41165.21SANTA CRUZ ISLANDS
2015-06-17 12:51:3310.07.0-35.36-17.39SOUTHERN MID-ATLANTIC RIDGE
2015-05-30 11:23:02677.67.827.83140.49BONIN ISLANDS REGION
2015-05-29 07:00:0861.77.056.69-156.53ALASKA PENINSULA
2015-05-07 07:10:2222.17.2-7.28154.53SOLOMON ISLANDS
2015-05-05 01:44:0763.17.4-5.50151.92NEW BRITAIN REGION, P.N.G.
2015-04-25 06:11:2511.97.928.1784.73NEPAL
2015-03-29 23:48:3465.77.7-4.75152.56NEW BRITAIN REGION, P.N.G.
2014-09-17 06:14:46133.97.113.74144.39MARIANA ISLANDS
2014-06-29 07:52:5714.77.1-55.56-28.57SOUTH SANDWICH ISLANDS REGION
2014-06-23 20:53:10114.48.051.80178.76RAT ISLANDS, ALEUTIAN ISLANDS
2014-06-23 19:19:1620.07.2-30.12-177.67KERMADEC ISLANDS, NEW ZEALAND
2014-04-19 13:27:5930.97.5-6.72154.93SOLOMON ISLANDS
2014-04-18 14:27:2948.67.517.59-100.74GUERRERO, MEXICO
2014-04-13 12:36:1835.07.5-11.45162.06SOLOMON ISLANDS
2014-04-12 20:14:3929.37.6-11.31162.21SOLOMON ISLANDS
2014-04-03 02:43:1520.07.8-20.43-70.11NEAR COAST OF NORTHERN CHILE
2014-04-01 23:46:4510.08.0-19.63-70.86NEAR COAST OF NORTHERN CHILE
2014-03-16 21:16:3335.07.0-19.84-70.57NEAR COAST OF NORTHERN CHILE
2013-11-17 09:04:5510.07.8-60.30-46.36SCOTIA SEA
2013-10-25 17:10:1610.07.337.19144.66OFF EAST COAST OF HONSHU, JAPAN
2013-10-15 00:12:3756.87.29.77124.02MINDANAO, PHILIPPINE ISLANDS
2013-09-24 11:29:4815.07.827.0265.55PAKISTAN
2013-08-30 16:25:0334.57.051.71-175.37ANDREANOF ISLANDS, ALEUTIAN IS.
2013-07-15 14:03:4231.37.3-60.86-25.19SOUTH SANDWICH ISLANDS REGION
2013-07-07 18:35:30378.77.2-3.94153.88NEW IRELAND REGION, P.N.G.
2013-05-24 05:44:48598.18.454.89153.22SEA OF OKHOTSK
2013-05-23 17:19:04171.37.4-23.02-177.11SOUTH OF FIJI ISLANDS
2013-04-19 03:05:53122.27.246.18150.80KURIL ISLANDS
2013-02-09 14:16:06129.27.01.14-77.36COLOMBIA
2013-02-08 15:26:3926.97.0-10.91165.96SANTA CRUZ ISLANDS
2013-02-06 01:12:235.78.0-10.75165.09SANTA CRUZ ISLANDS
2013-01-05 08:58:1910.07.555.39-134.65SOUTHEASTERN ALASKA
2012-12-10 16:53:09157.67.1-6.52129.81BANDA SEA
2012-11-07 16:35:4624.07.413.99-91.89NEAR COAST OF GUATEMALA
2012-10-28 03:04:1017.57.752.77-131.93QUEEN CHARLOTTE ISLANDS REGION
2012-09-30 16:31:34150.47.11.97-76.32COLOMBIA
2012-09-05 14:42:1040.77.610.12-85.35COSTA RICA
2012-08-31 12:47:3434.87.610.84126.70PHILIPPINE ISLANDS REGION
2012-08-27 04:37:2352.97.412.28-88.53OFF COAST OF CENTRAL AMERICA
2012-08-14 02:59:42625.97.749.78145.13SEA OF OKHOTSK
2012-04-12 07:15:4810.36.928.79-113.14BAJA CALIFORNIA, MEXICO
2012-04-11 10:43:0916.48.20.7792.45OFF W COAST OF NORTHERN SUMATERA
2012-04-11 08:38:3833.08.72.3593.07OFF W COAST OF NORTHERN SUMATERA
2012-03-20 18:02:4817.57.616.66-98.19NEAR COAST OF GUERRERO, MEXICO
2012-03-14 09:08:3512.07.040.89144.94OFF EAST COAST OF HONSHU, JAPAN
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