New Report: Ridgecrest Earthquake Sequence Reconnaissance Report

2020 08 Ridgecrest Report


As a managing partner of the California Earthquake Clearinghouse, EERI, along with the California Geological Survey, operated a physical clearinghouse location in Ridgecrest, CA following the M6.4 earthquake on July 4, 2019. Over the course of the weeklong activation, the scientific and engineering communities came together in clearinghouse briefing calls to coordinate, collaborate, and share information. The Ridgecrest Earthquake Sequence Reconnaissance Report is a product of this community effort to document impacts and share lessons.

The multi-disciplinary report captures reconnaissance findings from the first months following the main shock and includes sections from over 30 contributors. The report includes sections on geosciences, geotechnical impacts, lifelines, structural impacts, emergency response, clearinghouse operations, and data collection methods and products. The report features a close look at the extent of damage to manufactured homes, which emphasized the vulnerability of these structures, given the limited occurrence of damage to structures overall in the City of Ridgecrest. The report also includes several sections on data collection methods and products that show progress in collecting and coordinating post-earthquake data.

The report, along with many more resources, is available on the Ridgecrest Earthquake Sequence Virtual Clearinghouse site. This report was published as a part of EERI’s Learning from Earthquakes program with funding from FEMA. Read the report here.