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/18289313

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 7.8 (GCMT) SOUTH OF ALASKA (Inactive) icon
Centroid Event
Date-Time (UTC): 2020-07-22 06:13:16
Location: SOUTH OF ALASKA
Latitude, Longitude: 54.840 °, -159.270 °
Magnitude: 7.8 MW
Depth: 36.8 km
Author: Global CMT Project
Catalog, Contributor: GCMT, GCMT
Event
Date-Time (UTC): 2020-07-22 06:12:44
Location: ALASKA PENINSULA
Latitude, Longitude: 55.030 °, -158.522 °
Magnitude: 7.8 Mww (us)
Depth: 28.0 km
Author: at,us,pt,ak
Catalog, Contributor: NEIC PDE, us
Related Products:
CMT Details
Event ID C202007220612A
Timestamp: Q-20200722075158
CMT Version: Quick
NDK Version: V10
Reference Catalog: PDEQ
Source Zero Trace
Moment Rate Fn: TRIHD
Half Duration: 20.5
Depth Determination: FREE
Scalar Moment 7.402 e+27 (dyne-cm)
Focal Mechanism
Moment Tensor (Exponent: 27, Units: dyne-cm)
ComponentValueError
Mrr4.170.013
Mtt-3.220.009
Mpp-0.9560.008
Mrt5.430.061
Mrp2.860.053
Mtp-1.670.005
Principal Axes (Length Exponent: 27, Units: dyne-cm)
NameAzimuth (°)Plunge (°)Length
T332627.434
N2420-0.071
P15228-7.369
Nodal Planes
NameStrike (°)Dip (°)Rake (°)
NP12421790
NP2627390
Data Used in Inversion
TypeStationsComponentsShortest Period (s)
Body Waves15838650
Mantle Waves165468150
Surface Waves13222450
Event Location
Source NDK
PDEQ 2020/07/22 06:12:44.6  55.03 -158.52  28.0 0.0 7.8 ALASKA PENINSULA        
C202007220612A   B:158  386  50 S:132  224  50 M:165  468 150 CMT: 1 TRIHD: 20.5
CENTROID:     31.7 0.1  54.84 0.00 -159.27 0.01  36.8  0.3 FREE Q-20200722075158
27  4.170 0.013 -3.220 0.009 -0.956 0.008  5.430 0.061  2.860 0.053 -1.670 0.005
V10   7.434 62 332  -0.071  0 242  -7.369 28 152   7.402 242 17   90  62 73   90
Other Formats
Other Products For This Event
Product TypeDescriptionOrganization
Global ShakeMovie syntheticGlobal ShakeMovie synthetic for MW 7.8 SOUTH OF ALASKAIRIS
Moment TensorMoment Tensor for MW 7.8 (GCMT) SOUTH OF ALASKAIRIS DMC
Surface-Wave Radiation PatternsSurface-Wave Radiation Patterns for MW 7.8 SOUTH OF ALASKAIncorporated Research Institutions for Seismology
Event PlotsEvent Plots for Mww 7.8 ALASKA PENINSULAIncorporated Research Institutions for Seismology
Source Time FunctionSource Time Function for Mww 7.8 ALASKA PENINSULAIncorporated Research Institutions for Seismology
EQ EnergyEQ Energy for Mww 7.8 ALASKA PENINSULAIncorporated Research Institutions for Seismology
Back ProjectionsBack Projections for Mww 7.8 ALASKA PENINSULAIncorporated Research Institutions for Seismology
AftershocksAftershocks for Mww 7.8 ALASKA PENINSULAIncorporated Research Institutions for Seismology
GMVGMV for Mww 7.8 ALASKA PENINSULAIncorporated Research Institutions for Seismology
Contributions