Fig. 1: Ground failure triggered by the Mw 7.1 2019 Ridgecrest, California, earthquake. | Nature Communications

Fig. 1: Ground failure triggered by the Mw 7.1 2019 Ridgecrest, California, earthquake.

From: The influence of anthropogenic regulation and evaporite dissolution on earthquake-triggered ground failure

Fig. 1

a Regional context, showing the U.S. Geological Survey (USGS) liquefaction prediction model and ShakeMap contours3, optically derived change detection using Sentinel-2 data (i.e., estimated ejecta), fault surface rupture4, and present-day playas64. The dots show locations of the two geologic cores shown in Fig. 3a23. Insets show two areas with surface ejecta in more detail, with field observation of ejecta (i.e., observed ejecta) shown as green dots. b Surface ejecta in Searles Lake (blue) overlying a lidar digital elevation model65. Also shown are the locations of USGS geologic cores20, geotechnical CPT data (enlarged in the inset), and the central portion of the lakebed where the thickest evaporite units are located10 (dashed line). c Optical imagery of the hexagonal ejecta the day after the Ridgecrest earthquake (Bing™Maps, 2023). d Optically detected surface change following the Ridgecrest earthquake, generated using © 2019 Planet Labs PBC imagery (refer to “Methods” section). Dashed lines outline the hexagonal ejecta. Note that CPT 1 in b is the ___location of the cone penetration test sounding shown in Fig. 3. Microsoft product screen shot(s) reprinted with permission from Microsoft Corporation.

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