Moderate mag. 4.0 earthquake - 30 mi northwest of El Sentro, Imperial County, California, USA, on Wednesday, Aug 18, 2021 2:45 pm (GMT -7) -

Moderate mag. 4.0 earthquake - 30 mi northwest of El Sentro, Imperial County, California, USA, on Wednesday, Aug 18, 2021 2:45 pm (GMT -7)

Moderate magnitude 4.0 earthquake at 7 km depth

18 Aug 21:48 UTC: First to report: EMSC after 3 minutes.
18 Aug 21:48: Now using data updates from USGS
18 Aug 21:52: Magnitude recalculated from 3.7 to 4.0.
18 Aug 22:11: Hypocenter depth recalculated from 8.8 to 7.1 km (from 5.5 to 4.4 mi).
Update Wed, 18 Aug 2021, 21:57
Magnitude 4.0 earthquake strikes near El Centro, Imperial County, California, USA
4.0 quake 18 Aug 2:45 pm (GMT -7)
4.0 quake 18 Aug 2:45 pm (GMT -7)
An earthquake of magnitude 4.0 occurred only 12 minutes ago 30 miles northwest of El Centro, California, United States, the United States Geological Survey reported.
The quake hit at a very shallow depth of 5.5 miles beneath the epicenter near El Centro, Imperial County, California, USA, early afternoon on Wednesday 18 August 2021 at 2:45 pm local time. 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 Salton City (pop. 3,800) located 16 miles from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Brawley (pop. 25,900) located 26 miles from the epicenter, Calipatria (pop. 7,400) 26 miles away, Imperial (pop. 17,100) 27 miles away, El Centro (pop. 44,000) 30 miles away, Santa Isabel (pop. 29,300) 38 miles away, Calexico (pop. 40,100) 38 miles away, Coachella (pop. 44,600) 44 miles away, and La Quinta (pop. 40,500) 46 miles away.

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Earthquake data

Date & time: Aug 18, 2021 21:45:14 UTC -
Local time at epicenter: Wednesday, Aug 18, 2021 2:45 pm (GMT -7)
Magnitude: 4
Depth: 7.1 km
Epicenter latitude / longitude: 33.07333°N / 115.95983°W (Imperial, California, United States)
Antipode: 33.073°S / 64.04°E
Nearest volcano: Salton Buttes (34 km / 21 mi)
Nearby towns and cities:
25 km (16 mi) S of Salton City (pop: 3,760) --> See nearby quakes!
41 km (26 mi) WNW of Brawley (Imperial County) (pop: 25,900) --> See nearby quakes!
42 km (26 mi) W of Calipatria (pop: 7,420) --> See nearby quakes!
44 km (27 mi) NW of Imperial (pop: 17,100) --> See nearby quakes!
48 km (30 mi) NW of El Sentro (pop: 44,000) --> See nearby quakes!
61 km (38 mi) NW of Santa Isabel (Baja California, Mexico) (pop: 29,300) --> See nearby quakes!
61 km (38 mi) NW of Calexico (pop: 40,100) --> See nearby quakes!
70 km (44 mi) SSE of Coachella (pop: 44,600) --> See nearby quakes!
73 km (46 mi) SSE of La Quinta (pop: 40,500) --> See nearby quakes!
790 km (491 mi) SE of Sacramento (pop: 490,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 36.9°C (98 F), humidity: 30%, wind: 8 m/s (15 kts) from WSW
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
4.07.1 km18km ESE of Ocotillo Wells, CAUSGS
3.95 kmSOUTHERN CALIFORNIAEMSC

User reports for this quake (10)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Addie hunt Palm desert California (79.8 km NNW of epicenter) [Map] / not felt / 2-5 s : Watched my Dr pepper in a glass shaking | 4 users found this interesting. (reported through our app)  
653 Baywood Street, Imperial, CA. / Light shaking (MMI IV) / both vertical and horizontal swinging / 5-10 s : I felt a swaying motion. | 3 users found this interesting.  
Hesperia (191.2 km NW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s : I little jolt | 2 users found this interesting. (reported through our app)  
Pahrump NV / not felt : Don't think I felt it cats knock over something so I don't think it was from the quake. | One user found this interesting.  
Canoga Park, Los Angeles, California (275.1 km WNW of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Chatsworth, Los Angeles, California (275.5 km WNW of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Las Vegas, nv. 89148 (340.1 km N of epicenter) [Map] / Very weak shaking (MMI II) / 2-5 s (reported through our app)
Palm Springs, ca (98.5 km NNW of epicenter) [Map] / not felt (reported through our app)
Tecate / Light shaking (MMI IV) / single lateral shake / 2-5 s
Westmorland, CA (31.9 km E of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging (reported through our app)
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