Moderate magnitude 4.0 earthquake at 3 km depth
17 Oct 13:21 UTC: First to report: USGS after 3 minutes.
17 Oct 13:25: Magnitude recalculated from 3.9 to 4.0.
Update Sun, 17 Oct 2021, 13:30Moderate 4.0 quake hits near Ridgecrest, Kern County, California, USA
4.0 quake 17 Oct 6:19 am (GMT -7)
An earthquake of magnitude 4.0 occurred early morning on Sunday, October 17th, 2021, at 6:19 am local time near Ridgecrest, Kern County, California, USA, as reported by the United States Geological Survey.
According to preliminary data, the quake was located at a very shallow depth of 2 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 4.0 earthquake as well.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Olancha (pop. 190) located 10 miles from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Lone Pine (pop. 2,000) located 30 miles from the epicenter, Magnolia (pop. 1,100) 39 miles away, Searles Valley (pop. 1,700) 40 miles away, China Lake Acres (pop. 1,900) 40 miles away, and Ridgecrest (pop. 28,800) 42 miles away.
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