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EERI earthquake reconnaissance report: 2019 Ridgecrest earthquake sequence

July 1, 2020

The Ridgecrest Earthquake Sequence began the morning of 4 July 2019 with an M6.4 earthquake at 10:33 a.m., closely following several small foreshocks. The epicenter of this event was roughly 11 miles (18 km) east-northeast of Ridgecrest (Figure 1) within the Naval Air Weapons Station China Lake (NAWS-CL). Seismic and geologic data established that the M6.4 earthquake occurred primarily along a steeply dipping northeast-trending strike-slip fault with left-lateral slip. This earthquake and preliminary reports of damage in Ridgecrest and Trona and associated ground cracking triggered a response by earthquake scientists and engineers throughout the region. A California Earthquake Clearinghouse was established in Ridgecrest to help coordinate the scientific response effort and to share data. 

Citation Information

Publication Year 2020
Title EERI earthquake reconnaissance report: 2019 Ridgecrest earthquake sequence
Authors EERI Learning from Earthquakes Program, Katherine Scharer
Publication Type Report
Publication Subtype Organization Series
Index ID 70236710
Record Source USGS Publications Warehouse
USGS Organization Earthquake Science Center