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 7.0 (GCMT) TONGA ISLANDS icon
Centroid Event
Date-Time (UTC): 2025-03-30 12:19:01
Location: TONGA ISLANDS
Latitude, Longitude: -20.380 °, -173.640 °
Magnitude: 7.0 MW
Depth: 37.7 km
Author: Global CMT Project
Catalog, Contributor: GCMT, GCMT
Event
Date-Time (UTC): 2025-03-30 12:18:50
Location: TONGA ISLANDS
Latitude, Longitude: -20.309 °, -174.080 °
Magnitude: 7.0 mww (us)
Depth: 29.0 km
Author: us,at,pt,usauto
Catalog, Contributor: NEIC PDE, us
Related Products:
CMT Details
Event ID C202503301218A
Timestamp: S-20250530203200
CMT Version: Final
NDK Version: V10
Reference Catalog: PDEW
Source Zero Trace
Moment Rate Fn: TRIHD
Half Duration: 7.9
Depth Determination: FREE
Scalar Moment 4.201 e+26 (dyne-cm)
Focal Mechanism
Moment Tensor (Exponent: 26, Units: dyne-cm)
ComponentValueError
Mrr3.390.013
Mtt0.1050.01
Mpp-3.490.01
Mrt0.2610.027
Mrp1.620.025
Mtp1.850.008
Principal Axes (Length Exponent: 26, Units: dyne-cm)
NameAzimuth (°)Plunge (°)Length
T307713.881
N162150.645
P6910-4.521
Nodal Planes
NameStrike (°)Dip (°)Rake (°)
NP11403764
NP235257109
Data Used in Inversion
TypeStationsComponentsShortest Period (s)
Body Waves16645850
Mantle Waves157379150
Surface Waves16740050
Event Location
Source NDK
PDEW 2025/03/30 12:18:50.4 -20.30 -174.07  29.0 0.0 7.0 TONGA ISLANDS           
C202503301218A   B:166  458  50 S:167  400  50 M:157  379 150 CMT: 1 TRIHD:  7.9
CENTROID:     10.6 0.1 -20.38 0.00 -173.64 0.00  37.7  0.2 FREE S-20250530203200
26  3.390 0.013  0.105 0.010 -3.490 0.010  0.261 0.027  1.620 0.025  1.850 0.008
V10   3.881 71 307   0.645 15 162  -4.521 10  69   4.201 140 37   64 352 57  109
Other Formats
Other Products For This Event
Product TypeDescriptionOrganization
Global ShakeMovie syntheticGlobal ShakeMovie synthetic for MW 7.0 TONGA ISLANDSIRIS
AftershocksAftershocks for mww 7.0 TONGA ISLANDSIRIS DMC
Surface-Wave Radiation PatternsSurface-Wave Radiation Patterns for MW 7.0 TONGA ISLANDSIncorporated Research Institutions for Seismology
Back ProjectionsBack Projections for mww 7.1 TONGA ISLANDSIRIS DMC
Event PlotsEvent Plots for mww 7.1 TONGA ISLANDSIncorporated Research Institutions for Seismology
GMVGMV for mww 7.1 TONGA ISLANDSIncorporated Research Institutions for Seismology
Contributions