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GEOREF RECORD

Types and areal distribution of ground failure associated with the 2019 Ridgecrest, California, earthquake sequence

Randall W. Jibson
Types and areal distribution of ground failure associated with the 2019 Ridgecrest, California, earthquake sequence
Bulletin of the Seismological Society of America (May 2020) 110 (4): 1567-1578

Abstract

The July 2019 Ridgecrest, California, earthquake sequence included the largest earthquake (M 7.1) to strike the conterminous United States in the past 20 yr. To characterize the types, numbers, and areal distributions of different types of ground failure (landslides, liquefaction, and ground cracking), I conducted a field investigation of ground failure triggered by the sequence around the periphery of the epicentral area (which had limited access). The earthquake sequence triggered sparse and widely scattered landslides over an area of approximately 22,000 km2 and at a maximum epicentral distance of 114 km; these metrics are within the upper bounds as compared with global averages for earthquakes of similar size. Some rock falls blocked primary and secondary roads, but no other landslide damage was reported. Almost all of the landslides in the peripheral area were small rock falls ( approximately 1-10 m3), but a few larger ( approximately 100 m3) rock slides also occurred. Though there are only informal reports about ground failure in the immediate epicentral area and we lack a detailed survey there, the small number (hundreds) and size of the landslides still seems to be far below global averages for M 7.1. This could be a result of the arid landscape and lack of a deeply weathered zone of soil and regolith. Liquefaction occurred along part of the western margin of Searles Valley. One large ( approximately 0.4 km2) lateral spread caused by liquefaction severely damaged parts of Trona. Minor liquefaction also occurred in a approximately 100-m-wide band along the fault-rupture zone in some places.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 110
Serial Issue: 4
Title: Types and areal distribution of ground failure associated with the 2019 Ridgecrest, California, earthquake sequence
Author(s): Jibson, Randall W.
Affiliation: U.S. Geological Survey, Denver Federal Center, Denver, CO, United States
Pages: 1567-1578
Published: 20200505
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 24
Accession Number: 2020-057893
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch maps
N35°00'00" - N37°00'00", W119°00'00" - W117°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202035
Program Name: USGSOPNon-USGS publications with USGS authors
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