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 6.4 (GCMT) OFF W COAST OF NORTHERN SUMATRA icon
Centroid Event
Date-Time (UTC): 2025-11-27 04:56:31
Location: OFF W COAST OF NORTHERN SUMATRA
Latitude, Longitude: 2.490 °, 95.870 °
Magnitude: 6.4 MW
Depth: 22.6 km
Author: Global CMT Project
Catalog, Contributor: GCMT, GCMT
Event
Date-Time (UTC): 2025-11-27 04:56:24
Location: OFF W COAST OF NORTHERN SUMATRA
Latitude, Longitude: 2.757 °, 95.985 °
Magnitude: 6.6 mww (us)
Depth: 17.0 km
Author: us,usauto,at
Catalog, Contributor: NEIC PDE, us
Related Products:
CMT Details
Event ID C202511270456A
Timestamp: Q-20251127073848
CMT Version: Quick
NDK Version: V10
Reference Catalog: PDEQ
Source Zero Trace
Moment Rate Fn: TRIHD
Half Duration: 3.2
Depth Determination: FREE
Scalar Moment 4.457 e+25 (dyne-cm)
Focal Mechanism
Moment Tensor (Exponent: 25, Units: dyne-cm)
ComponentValueError
Mrr2.940.02
Mtt-1.980.014
Mpp-0.9670.016
Mrt2.190.033
Mrp-2.50.038
Mtp1.440.011
Principal Axes (Length Exponent: 25, Units: dyne-cm)
NameAzimuth (°)Plunge (°)Length
T57654.473
N3137-0.039
P22024-4.441
Nodal Planes
NameStrike (°)Dip (°)Rake (°)
NP12962272
NP21356997
Data Used in Inversion
TypeStationsComponentsShortest Period (s)
Body Waves13827840
Mantle Waves131219125
Surface Waves14231950
Event Location
Source NDK
PDEQ 2025/11/27 04:56:26.5   2.69   96.03  25.4 0.0 6.6 NORTHERN SUMATRA, INDONE
C202511270456A   B:138  278  40 S:142  319  50 M:131  219 125 CMT: 1 TRIHD:  3.2
CENTROID:      4.9 0.1   2.49 0.00   95.87 0.00  22.6  0.2 FREE Q-20251127073848
25  2.940 0.020 -1.980 0.014 -0.967 0.016  2.190 0.033 -2.500 0.038  1.440 0.011
V10   4.473 65  57  -0.039  7 313  -4.441 24 220   4.457 296 22   72 135 69   97
Other Formats
Other Products For This Event
Product TypeDescriptionOrganization
Global ShakeMovie syntheticGlobal ShakeMovie synthetic for MW 6.4 OFF W COAST OF NORTHERN SUMATRAIRIS
GMVGMV for mww 6.6 NORTHERN SUMATRA, INDONESIAIncorporated Research Institutions for Seismology
AftershocksAftershocks for mww 6.6 NORTHERN SUMATRA, INDONESIAIRIS DMC
EQ EnergyEQ Energy for mww 6.6 NORTHERN SUMATRA, INDONESIAIncorporated Research Institutions for Seismology
Event PlotsEvent Plots for mww 6.6 NORTHERN SUMATRA, INDONESIAIncorporated Research Institutions for Seismology
Surface-Wave Radiation PatternsSurface-Wave Radiation Patterns for MW 6.4 OFF W COAST OF NORTHERN SUMATRAIncorporated Research Institutions for Seismology
Back ProjectionsBack Projections for mww 6.6 NORTHERN SUMATRA, INDONESIAEarthScope
Contributions