Folders: ROOT > ScienceBase Catalog > USGS Data Release Products > Displacement and strain field from the 2019 Ridgecrest earthquakes derived from analysis of WorldView optical satellite imagery (ver. 2.0, May 2021) ( Show all descendants )
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Summary: This directory contains a second version of the mosaics of the 2-dimensional (2D) surface strain fields of the 2019 Mw7.1 and Mw6.4 Ridgecrest earthquakes derived from optical correlation. These results are derived through a modification to the inversion approach described in Barnhart et al. 2020 (Nature Geoscience) wherein we remove the UTM reference frame when building the Green’s function that is incorporated into the inversion for the displacement gradient tensor. The removal of the reference frame has the effect of improving the condition number of the Green’s function and making the inversion more stable. The mosaics are in UTM Zone 11N coordinates with 10m spatial resolution. Each file is in units...
Associated publication: Barnhart, W.D., Gold, R.D., Hollingsworth, J., 2020 Localized fault zone dilatancy and surface inelasticity of the 2019 Ridgecrest earthquakes. Nature Geoscience. DOI: 10.1038/s41561-020-0628-8. We derived co-seismic horizontal displacements of the Ridgecrest earthquakes through sub-pixel cross correlation of satellite optical imagery from the DigitalGlobe satellites Worldview-1 (WV01), Worldview-2 (WV02), and Worldview-3 (WV03). Pre-event stereo images were acquired between September and December 2014, and post-event images were acquired between July and August 2019. The horizontal and vertical raster files are are in UTM Zone 11N coordinates with 2-m spatial resolution. Details concerning...
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Associated publication: Barnhart, W.D., Gold, R.D., Hollingsworth, J., 2020 Localized fault zone dilatancy and surface inelasticity of the 2019 Ridgecrest earthquakes. Nature Geoscience. DOI: 10.1038/s41561-020-0628-8. This directory contains mosaics of the 2-dimensional (2D) and 3-dimensional surface strain fields of the 2019 Mw7.1 and Mw6.4 Ridgecrest earthquakes derived from optical correlation and differenced digital surface models (DSMs). The mosaics are in UTM Zone 11N coordinates with 10m spatial resolution. Each file is in units of strain (i.e., to plot the strain fields with a color limit of +/- 1% strain, restrict the colorbar to -0.01 and 0.01. Note this example will saturate the color scale). Users...
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