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2019 Ridgecrest earthquakes
July 4–5, 2019, earthquakes in California
2019 Ridgecrest earthquakes
Earthquakes occurred north and northeast of the town of Ridgecrest, California, located in Kern County and west of Searles Valley (approximately 200 km [122 mi] north-northeast of Los Angeles) on July 4-5, 2019. They included two initial main shocks of Mw magnitudes 6.4 and 7.1, and many perceptible aftershocks, mainly within the area of the Naval Air Weapons Station China Lake. Eleven months later, a Mw5.5 aftershock took place (the largest aftershock of the sequence) to the east of Ridgecrest. The first main shock (now deemed to be a foreshock) occurred on Thursday, July 4 at 10:33 a.m. PDT, approximately 18 km (11.2 mi) ENE of Ridgecrest, and 13 km (8.1 mi) WSW of Trona, on a previously unnoticed NE-SW trending fault where it intersects the NW-SE trending Little Lake Fault Zone. This quake was preceded by several smaller earthquakes, and was followed by more than 1,400 detected aftershocks. The M 7.1 quake struck on Friday, July 5 at 8:19 p.m. PDT approximately 10 km (6 miles) to the...
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