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: 2.470 °, 95.820 °
Magnitude: 6.4 MW
Depth: 23.2 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: S-20260130003713
CMT Version: Final
NDK Version: V10
Reference Catalog: PDEW
Source Zero Trace
Moment Rate Fn: TRIHD
Half Duration: 4.0
Depth Determination: FREE
Scalar Moment 5.365 e+25 (dyne-cm)
Focal Mechanism
Moment Tensor (Exponent: 25, Units: dyne-cm)
ComponentValueError
Mrr2.840.019
Mtt-1.90.014
Mpp-0.940.015
Mrt3.010.043
Mrp-3.380.048
Mtp1.420.011
Principal Axes (Length Exponent: 25, Units: dyne-cm)
NameAzimuth (°)Plunge (°)Length
T55615.376
N3156-0.023
P22129-5.353
Nodal Planes
NameStrike (°)Dip (°)Rake (°)
NP12951770
NP21367496
Data Used in Inversion
TypeStationsComponentsShortest Period (s)
Body Waves17041050
Mantle Waves155263125
Surface Waves16438250
Event Location
Source NDK
PDEW 2025/11/27 04:56:24.6   2.76   95.99  17.0 0.0 6.6 OFF W COAST OF NORTHERN 
C202511270456A   B:170  410  50 S:164  382  50 M:155  263 125 CMT: 1 TRIHD:  4.0
CENTROID:      7.3 0.0   2.47 0.00   95.82 0.00  23.2  0.2 FREE S-20260130003713
25  2.840 0.019 -1.900 0.014 -0.940 0.015  3.010 0.043 -3.380 0.048  1.420 0.011
V10   5.376 61  55  -0.023  6 315  -5.353 29 221   5.365 295 17   70 136 74   96
Other Formats
Other Products For This Event
Product TypeDescriptionOrganization
Global ShakeMovie syntheticGlobal ShakeMovie synthetic for MW 6.4 OFF W COAST OF NORTHERN SUMATRAIRIS
Back ProjectionsBack Projections for mww 6.6 NORTHERN SUMATRA, INDONESIAEarthScope
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
Contributions