Moderate mag. 4.0 earthquake - Inyo County, 42 mi north of Ridgecrest, Kern County, California, USA, on Sunday, Oct 17, 2021 6:19 am (GMT -7) -

Moderate mag. 4.0 earthquake - Inyo County, 42 mi north of Ridgecrest, Kern County, California, USA, on Sunday, Oct 17, 2021 6:19 am (GMT -7)

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, 13:30
Moderate 4.0 quake hits near Ridgecrest, Kern County, California, USA
4.0 quake 17 Oct 6:19 am (GMT -7)
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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Earthquake data

Date & time: Oct 17, 2021 13:19:00 UTC -
Local time at epicenter: Sunday, Oct 17, 2021 6:19 am (GMT -7)
Magnitude: 4
Depth: 3.2 km
Epicenter latitude / longitude: 36.2125°N / 117.85783°W (Inyo, California, United States)
Antipode: 36.213°S / 62.142°E
Nearest volcano: Coso (21 km / 13 mi)
Nearby towns and cities:
16 km (10 mi) ESE of Olancha (pop: 192) --> See nearby quakes!
48 km (30 mi) SSE of Lone Pine (pop: 2,040) --> See nearby quakes!
63 km (39 mi) N of Magnolia (pop: 1,100) --> See nearby quakes!
64 km (40 mi) NW of Searles Valley (pop: 1,740) --> See nearby quakes!
68 km (42 mi) NNW of Ridgecrest (pop: 28,800) --> See nearby quakes!
105 km (65 mi) E of Porterville (pop: 56,100) --> See nearby quakes!
129 km (80 mi) E of Visalia (pop: 130,100) --> See nearby quakes!
134 km (83 mi) E of Tulare (pop: 62,300) --> See nearby quakes!
140 km (87 mi) NE of Bakersfield (pop: 373,600) --> See nearby quakes!
415 km (258 mi) SE of Sacramento (pop: 490,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 9°C (48 F), humidity: 22%, wind: 2 m/s (5 kts) from SSW
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) More info
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
4.03.2 km15km ESE of Olancha, CAUSGS
4.03 kmCENTRAL CALIFORNIAEMSC

User reports for this quake (6)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Long beach califprnia / not felt
Long beach califprnia / not felt
San Marcos / not felt (reported through our app)
San Francisco North Bay Area / not felt : No shaking noticed north of San Francisco.  
Canoga Park / Light shaking (MMI IV) (reported through our app)
Darwin ca / Moderate shaking (MMI V) / vertical swinging (up and down) / 2-5 s
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