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/20374589

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 icon
Centroid Event
Date-Time (UTC): 2022-04-19 04:33:48
Location: TONGA ISLANDS
Latitude, Longitude: -21.320 °, -173.660 °
Magnitude: 6.1 MW
Depth: 33.5 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: S-20220630000858
CMT Version: Final
NDK Version: V10
Reference Catalog: PDEW
Source Zero Trace
Moment Rate Fn: TRIHD
Half Duration: 2.7
Depth Determination: FREE
Scalar Moment 1.789 e+25 (dyne-cm)
Focal Mechanism
Moment Tensor (Exponent: 25, Units: dyne-cm)
ComponentValueError
Mrr1.170.009
Mtt0.4510.008
Mpp-1.620.007
Mrt0.3730.013
Mrp0.9350.012
Mtp0.3910.006
Principal Axes (Length Exponent: 25, Units: dyne-cm)
NameAzimuth (°)Plunge (°)Length
T321621.643
N180230.292
P8316-1.935
Nodal Planes
NameStrike (°)Dip (°)Rake (°)
NP11443548
NP21265116
Data Used in Inversion
TypeStationsComponentsShortest Period (s)
Body Waves15136440
Mantle Waves120195125
Surface Waves16238450
Event Location
Source NDK
PDEW 2022/04/19 04:33:43.4 -21.50 -173.81  18.0 0.0 5.9 TONGA ISLANDS           
C202204190433A   B:151  364  40 S:162  384  50 M:120  195 125 CMT: 1 TRIHD:  2.7
CENTROID:      4.6 0.0 -21.32 0.00 -173.66 0.00  33.5  0.2 FREE S-20220630000858
25  1.170 0.009  0.451 0.008 -1.620 0.007  0.373 0.013  0.935 0.012  0.391 0.006
V10   1.643 62 321   0.292 23 180  -1.935 16  83   1.789 144 35   48  12 65  116
Other Formats
Other Products For This Event
Product TypeDescriptionOrganization
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