Fusing GNSS, InSAR and Imagery to Improve Spatio-Temporal Measurement of Crustal Deformation in the Salton Trough
Date: 4/25/2019
Time: 09:00 AM
Room: Puget Sound
The Salton Trough is a transtentional basin in southern California with high rates of deformation along a network of conjugate faults. Following the 2010 M7.2 El Mayor – Cucapah earthquake the region has exhibited highly time dependent crustal deformation. The high and variable rates of deformation and availability of observational data from a variety of geodetic techniques make the Salton Trough and southern California an ideal place to develop and test data fusion methodologies. We have developed tools to easily extract Global Navigation Satellite System (GNSS) vectors to produce long-term velocities, coseismic motions, postseismic motions separate from total motion in a given time window, and displacements over a specified time frame. Cluster analysis tools can then be used to search for, identify, and rank active faults or boundaries between blocks. The cluster analysis can be performed on all or a subset of the vector components to identify different crustal processes. GNSS data are spatially sparse with network stations on the order of 10-20 km apart in southern California. Interferometric Synthetic Aperture Radar (InSAR) data provide less frequent but high-resolution line of sight deformation maps that can be used to interpolate between GNSS stations. Airborne InSAR such as from NASA’s UAVSAR platform provides data with 7m pixels, and spaceborne InSAR provides on the order of 100 m pixel data. Topographic images provide data on the order of a few cm resolution from structure from motion (SfM) observations and decimeters to sub-meter for lidar and other imaging. Fusing these data provide a comprehensive understanding of surface deformation processes that can be used to model fault processes.
Presenting Author: Andrea Donnellan
Authors
Andrea Donnellan andrea@jpl.caltech.edu Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States Presenting Author
Corresponding Author
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Jay Parker jay.w.parker@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States |
Michael Heflin michael.b.heflin@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States |
Robert Granat robert.granat@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States |
Gregory Lyzenga lyzenga@g.hmc.edu Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States |
Margaret Glasscoe margaret.t.glasscoe@jpl.nasa.gov Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States |
Lisa Grant Ludwig lgrant@uci.edu University of California, Irvine, Irvine, California, United States |
John B Rundle john.b.rundle@gmail.com University of California, Davis, Davis, California, United States |
Jun Wang wang208@iu.edu Indiana University, Bloomington, Indiana, United States |
Marlon Pierce marpierc@iu.edu Indiana University, Bloomington, Indiana, United States |
Fusing GNSS, InSAR and Imagery to Improve Spatio-Temporal Measurement of Crustal Deformation in the Salton Trough
Category
Advances in Tectonic Geodesy