Filters: partyWithName: U.S. Geological Survey (X) > Categories: Data Release - In Progress (X) > partyWithName: U.S. Geological Survey, ROCKY MOUNTAIN REGION (X) > partyWithName: Harley M Benz (X)
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This data release provides documentation on the input and output files used in the tomographic imaging done in this study. This includes the station, location and arrivaltime input files to the tomography and the output relocations and resulting P- and S-wave images. The output results are relocated seismicity, tomographic velocity models (P and S-wave). We included a file containing coordinate information (latitude, longitude, elevation) of all California seismic stations, some of which are used in this study. Note that we did not use the S-wave imaging results in the study of Furlong et al. (2024)--see reference below. Checkerboard reconstructions are also provide, which includes the input and output models.
Categories: Data Release - In Progress;
Tags: Northern California,
biota,
seismology,
tectonic processes
The development and deployment of digital broadband seismographs provides the data required to rapidly assess earthquake size, determine source parameters and better characterize ground motions affecting earthquake hazard. The focus of regional moment tensor analysis is to estimate the moment magnitude, faulting parameters and source depth of earthquakes that are too small to be recorded teleseismically. Thus they have the potential of extending the earthquake catalog to magnitudes less than about M4-4.5. This data distribution provides the details required to critically review the resulting catalog, e.g., the waveforms used, processing parameters and velocity model. In addition the issue of the correct local magnitude...
Categories: Data,
Data Release - In Progress;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Europe,
Regional Moment Tensors,
biota,
earthquake occurrences
The variation of Love/Rayleigh phase and group velocity was determined for the continental U. S. and adjacent Canada. By processing ambient noise from the broadband channels of the Transportable Array (TA) of USArray and several PASSCAL experiments and using some earthquake recordings, the effort was focused toward determining dispersion down to periods as short as 2s. The relatively short distances between TA stations permitted the use of a 25 km x 25 km grid for the four independent tomographic inversions (Love/Rayleigh and Phase/group velocity). One reason for trying to obtain short period dispersion was to have a data set capable of constraining upper crust velocity models for use in determining regional moment...
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