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

When citing this Moment Tensor page please use the Digital Object Identifier (DOI):

doi:10.17611/DP/19927371

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 6.1 (GCMT) TONGA ISLANDS (Inactive) icon
Centroid Event
Date-Time (UTC): 2022-04-19 04:33:47
Location: TONGA ISLANDS
Latitude, Longitude: -21.330 °, -173.660 °
Magnitude: 6.1 MW
Depth: 33.6 km
Author: Global CMT Project
Catalog, Contributor: GCMT, GCMT
Event
Date-Time (UTC): 2022-04-19 04:33:43
Location: TONGA ISLANDS
Latitude, Longitude: -21.508 °, -173.812 °
Magnitude: 5.9 mww (us)
Depth: 18.0 km
Author: us,usauto,at,pt
Catalog, Contributor: NEIC PDE, us
Related Products:
CMT Details
Event ID C202204190433A
Timestamp: Q-20220419074044
CMT Version: Quick
NDK Version: V10
Reference Catalog: PDEQ
Source Zero Trace
Moment Rate Fn: TRIHD
Half Duration: 2.8
Depth Determination: FREE
Scalar Moment 1.812 e+25 (dyne-cm)
Focal Mechanism
Moment Tensor (Exponent: 25, Units: dyne-cm)
ComponentValueError
Mrr1.190.011
Mtt0.4690.009
Mpp-1.660.009
Mrt0.350.014
Mrp0.9540.014
Mtp0.3690.007
Principal Axes (Length Exponent: 25, Units: dyne-cm)
NameAzimuth (°)Plunge (°)Length
T320621.648
N180220.327
P8416-1.976
Nodal Planes
NameStrike (°)Dip (°)Rake (°)
NP11453549
NP21164114
Data Used in Inversion
TypeStationsComponentsShortest Period (s)
Body Waves13631740
Mantle Waves106167125
Surface Waves14533150
Event Location
Source NDK
PDEQ 2022/04/19 04:33:41.6 -21.45 -173.91  10.0 0.0 6.0 TONGA ISLANDS           
C202204190433A   B:136  317  40 S:145  331  50 M:106  167 125 CMT: 1 TRIHD:  2.8
CENTROID:      5.8 0.1 -21.33 0.00 -173.66 0.00  33.6  0.2 FREE Q-20220419074044
25  1.190 0.011  0.469 0.009 -1.660 0.009  0.350 0.014  0.954 0.014  0.369 0.007
V10   1.648 62 320   0.327 22 180  -1.976 16  84   1.812 145 35   49  11 64  114
Other Formats
Other Products For This Event
Product TypeDescriptionOrganization
Moment TensorMoment Tensor for MW 6.1 (GCMT) TONGA ISLANDSIRIS DMC
Global ShakeMovie syntheticGlobal ShakeMovie synthetic for MW 6.1 TONGA ISLANDSIRIS
Surface-Wave Radiation PatternsSurface-Wave Radiation Patterns for MW 6.1 TONGA ISLANDSIncorporated Research Institutions for Seismology
GMVGMV for mww 6.0 TONGA ISLANDSIncorporated Research Institutions for Seismology
Event PlotsEvent Plots for mww 6.0 TONGA ISLANDSIncorporated Research Institutions for Seismology
Contributions