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 7.6 (GCMT) HOKKAIDO, JAPAN REGION icon
Centroid Event
Date-Time (UTC): 2025-12-08 14:15:22
Location: HOKKAIDO, JAPAN REGION
Latitude, Longitude: 41.080 °, 142.630 °
Magnitude: 7.6 MW
Depth: 38.8 km
Author: Global CMT Project
Catalog, Contributor: GCMT, GCMT
Event
Date-Time (UTC): 2025-12-08 14:15:10
Location: NEAR EAST COAST OF HONSHU, JAPAN
Latitude, Longitude: 40.997 °, 142.180 °
Magnitude: 7.6 Mww (us)
Depth: 45.351 km
Author: at,pt,us,usauto
Catalog, Contributor: NEIC PDE, us
Related Products:
CMT Details
Event ID C202512081415A
Timestamp: Q-20251208133710
CMT Version: Quick
NDK Version: V10
Reference Catalog: PDEQ
Source Zero Trace
Moment Rate Fn: TRIHD
Half Duration: 15.0
Depth Determination: FREE
Scalar Moment 2.918 e+27 (dyne-cm)
Focal Mechanism
Moment Tensor (Exponent: 27, Units: dyne-cm)
ComponentValueError
Mrr1.470.006
Mtt0.060.003
Mpp-1.530.004
Mrt0.9890.021
Mrp2.270.026
Mtp-0.3730.003
Principal Axes (Length Exponent: 27, Units: dyne-cm)
NameAzimuth (°)Plunge (°)Length
T300602.87
N20060.097
P10729-2.967
Nodal Planes
NameStrike (°)Dip (°)Rake (°)
NP11821770
NP2227496
Data Used in Inversion
TypeStationsComponentsShortest Period (s)
Body Waves14741650
Mantle Waves144399150
Surface Waves14434150
Event Location
Source NDK
PDEQ 2025/12/08 14:15:10.4  41.04  142.14  44.1 0.0 7.6 HOKKAIDO, JAPAN REGION  
C202512081415A   B:147  416  50 S:144  341  50 M:144  399 150 CMT: 1 TRIHD: 15.0
CENTROID:     12.1 0.1  41.08 0.01  142.63 0.01  38.8  0.3 FREE Q-20251208133710
27  1.470 0.006  0.060 0.003 -1.530 0.004  0.989 0.021  2.270 0.026 -0.373 0.003
V10   2.870 60 300   0.097  6 200  -2.967 29 107   2.918 182 17   70  22 74   96
Other Formats
Other Products For This Event
Product TypeDescriptionOrganization
GMVGMV for Mww 7.6 NEAR EAST COAST OF HONSHU, JAPANIncorporated Research Institutions for Seismology
Back ProjectionsBack Projections for Mww 7.6 NEAR EAST COAST OF HONSHU, JAPANEarthScope
AftershocksAftershocks for Mww 7.6 NEAR EAST COAST OF HONSHU, JAPANIRIS DMC
EQ EnergyEQ Energy for Mww 7.6 NEAR EAST COAST OF HONSHU, JAPANIncorporated Research Institutions for Seismology
Event PlotsEvent Plots for Mww 7.6 NEAR EAST COAST OF HONSHU, JAPANIncorporated Research Institutions for Seismology
Surface-Wave Radiation PatternsSurface-Wave Radiation Patterns for MW 7.6 HOKKAIDO, JAPAN REGIONIncorporated Research Institutions for Seismology
Contributions