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 Moment Tensor Products

Global Centroid-Moment-Tensors from the GCMT project at Lamont-Doherty Earth Observatory are available through SPUD within minutes after their publication. Initial quick-CMT solutions are shown and are later updated to GCMT solutions when updates arrive. The download button gives users the full NDK format solution. For more info, visit: www.globalcmt.org.

Citing Global Centroid-Moment-Tensor Products

If you use Moment Tensors in publications, please cite according to the instructions at:

http://ds.iris.edu/ds/products/momenttensor/#citation

Moment Tensor Help

The page displays information for individual Moment Tensors.

The centroid origin is displayed next to the primary origin from the IRIS database followed by the moment tensor details.
Moment Tensor for MW 6.5 (GCMT) OFF EAST COAST OF HONSHU, JAPAN icon
Centroid Event
Date-Time (UTC): 2025-12-08 21:52:49
Location: OFF EAST COAST OF HONSHU, JAPAN
Latitude, Longitude: 40.890 °, 143.290 °
Magnitude: 6.5 MW
Depth: 24.0 km
Author: Global CMT Project
Catalog, Contributor: GCMT, GCMT
Event
Date-Time (UTC): 2025-12-08 21:52:41
Location: OFF EAST COAST OF HONSHU, JAPAN
Latitude, Longitude: 40.976 °, 143.151 °
Magnitude: 6.6 mww (us)
Depth: 19.0 km
Author: us,usauto,at
Catalog, Contributor: NEIC PDE, us
Related Products:
CMT Details
Event ID C202512082152A
Timestamp: S-20260228204128
CMT Version: Final
NDK Version: V10
Reference Catalog: PDEW
Source Zero Trace
Moment Rate Fn: TRIHD
Half Duration: 4.6
Depth Determination: FREE
Scalar Moment 8.207 e+25 (dyne-cm)
Focal Mechanism
Moment Tensor (Exponent: 25, Units: dyne-cm)
ComponentValueError
Mrr4.930.04
Mtt-0.1920.027
Mpp-4.740.032
Mrt2.630.055
Mrp5.980.08
Mtp-1.130.022
Principal Axes (Length Exponent: 25, Units: dyne-cm)
NameAzimuth (°)Plunge (°)Length
T300638.223
N2005-0.034
P10726-8.191
Nodal Planes
NameStrike (°)Dip (°)Rake (°)
NP11851974
NP2227295
Data Used in Inversion
TypeStationsComponentsShortest Period (s)
Body Waves16341650
Mantle Waves107142125
Surface Waves17145150
Event Location
Source NDK
PDEW 2025/12/08 21:52:41.3  40.98  143.15  19.0 0.0 6.6 OFF EAST COAST OF HONSHU
C202512082152A   B:163  416  50 S:171  451  50 M:107  142 125 CMT: 1 TRIHD:  4.6
CENTROID:      7.7 0.1  40.89 0.00  143.29 0.01  24.0  0.2 FREE S-20260228204128
25  4.930 0.040 -0.192 0.027 -4.740 0.032  2.630 0.055  5.980 0.080 -1.130 0.022
V10   8.223 63 300  -0.034  5 200  -8.191 26 107   8.207 185 19   74  22 72   95
Other Formats
Other Products For This Event
Product TypeDescriptionOrganization
Global ShakeMovie syntheticGlobal ShakeMovie synthetic for MW 6.5 OFF EAST COAST OF HONSHU, JAPANIRIS
Surface-Wave Radiation PatternsSurface-Wave Radiation Patterns for MW 6.5 OFF EAST COAST OF HONSHU, JAPANIncorporated Research Institutions for Seismology
GMVGMV for mww 6.6 HOKKAIDO, JAPAN REGIONIncorporated Research Institutions for Seismology
AftershocksAftershocks for mww 6.6 HOKKAIDO, JAPAN REGIONIRIS DMC
EQ EnergyEQ Energy for mww 6.6 HOKKAIDO, JAPAN REGIONIncorporated Research Institutions for Seismology
Event PlotsEvent Plots for mww 6.6 HOKKAIDO, JAPAN REGIONIncorporated Research Institutions for Seismology
Back ProjectionsBack Projections for mww 6.6 HOKKAIDO, JAPAN REGIONEarthScope
Contributions