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: 40.900 °, 143.320 °
Magnitude: 6.5 MW
Depth: 23.9 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: Q-20251209123826
CMT Version: Quick
NDK Version: V10
Reference Catalog: PDEW
Source Zero Trace
Moment Rate Fn: TRIHD
Half Duration: 4.9
Depth Determination: FREE
Scalar Moment 8.118 e+25 (dyne-cm)
Focal Mechanism
Moment Tensor (Exponent: 25, Units: dyne-cm)
ComponentValueError
Mrr4.870.041
Mtt-0.1720.026
Mpp-4.690.033
Mrt2.540.056
Mrp5.940.086
Mtp-1.140.022
Principal Axes (Length Exponent: 25, Units: dyne-cm)
NameAzimuth (°)Plunge (°)Length
T299638.119
N20050.007
P10726-8.118
Nodal Planes
NameStrike (°)Dip (°)Rake (°)
NP11861975
NP2217195
Data Used in Inversion
TypeStationsComponentsShortest Period (s)
Body Waves14436650
Mantle Waves92126125
Surface Waves14840250
Event Location
Source NDK
PDEW 2025/12/08 21:52:41.3  41.00  143.16  19.0 0.0 6.6 HOKKAIDO, JAPAN REGION  
C202512082152A   B:144  366  50 S:148  402  50 M: 92  126 125 CMT: 1 TRIHD:  4.9
CENTROID:      7.8 0.1  40.90 0.00  143.32 0.01  23.9  0.2 FREE Q-20251209123826
25  4.870 0.041 -0.172 0.026 -4.690 0.033  2.540 0.056  5.940 0.086 -1.140 0.022
V10   8.119 63 299   0.007  5 200  -8.118 26 107   8.118 186 19   75  21 71   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