Moderate mag. 3.9 earthquake - Imperial County, California, USA, on Friday, 11 Jun 2021 9:30 pm (GMT -7) -
Moderate magnitude 3.9 earthquake at 4 km depth
12 Jun 04:31 UTC: First to report: USGS after 1 minute.
12 Jun 04:35: Magnitude recalculated from 4.1 to 3.9. Hypocenter depth recalculated from 8.0 to 3.5 km (from 5 to 2.2 mi). Epicenter location corrected by 7.1 km (4.4 mi) towards ENE.
12 Jun 04:37: Magnitude recalculated from 3.2 to 3.9.
Update Sat, 12 Jun 2021, 04:36Small earthquake of magnitude 3.9 just reported 17 miles northwest of Brawley, California, United States
3.9 quake 11 Jun 9:30 pm (GMT -7)
Just 6 minutes ago, a 3.9-magnitude earthquake struck near Brawley, Imperial County, California, USA. The tremor was recorded in the evening on Friday 11 June 2021 at 9:30 pm local time, at a very shallow depth of 2.2 miles below the surface.
The event was filed by the United States Geological Survey, the first seismological agency to report it.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.2 earthquake.
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 Imperial Junction (pop. 1000) located 7 miles from the epicenter, Calipatria (pop. 7,400) 9 miles away, and Brawley (pop. 25,900) 17 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Imperial (pop. 17,100) located 25 miles from the epicenter, El Centro (pop. 44,000) 29 miles away, Calexico (pop. 40,100) 38 miles away, Coachella (pop. 44,600) 45 miles away, and Indio (pop. 87,500) 48 miles away.
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Date & time: 12 Jun 2021 04:30:28 UTC -
Local time at epicenter:
Friday, 11 Jun 2021 9:30 pm (GMT -7)
Depth: 3.5 km
Epicenter latitude / longitude: 33.21083°N / 115.63934°W
, United States
Nearest volcano: Salton Buttes
(9 km / 6 mi)
Nearby towns and cities:12 km (7 mi) WSW of Imperial Junction
(pop: 1,010) --> See nearby quakes!15 km (9 mi) NW of Calipatria
(pop: 7,420) --> See nearby quakes!28 km (17 mi) NNW of Brawley (Imperial County)
(pop: 25,900) --> See nearby quakes!41 km (25 mi) N of Imperial
(pop: 17,100) --> See nearby quakes!47 km (29 mi) N of El Centro
(pop: 44,000) --> See nearby quakes!61 km (38 mi) NNW of Calexico
(pop: 40,100) --> See nearby quakes!72 km (45 mi) SE of Coachella
(pop: 44,600) --> See nearby quakes!78 km (48 mi) SE of Indio
(pop: 87,500) --> See nearby quakes!109 km (68 mi) WNW of Arizona
(pop: 94,100) --> See nearby quakes!797 km (495 mi) SE of Sacramento
(pop: 490,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 32°C
(90 F), humidity: 28%, wind: 4 m/s (8 kts) from W
Primary data source: USGS
(United States Geological Survey)
Estimated released energy: 4.5 x 1010
joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) More info
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.
|3.9||3.5 km||12km WSW of Niland, CA||USGS|
|3.7||5 km||SOUTHERN CALIFORNIA||EMSC|
User reports for this quake (13)
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Canoga Park, Los Angeles, California (295.6 km WNW of epicenter) [Map]
/ Light shaking (MMI IV) (reported through our app)
Modesto calif / Light shaking (MMI IV) / complex rolling (tilting in multiple directions) : A jolt then rolling was fairly long we dont feel earthquakes often in Modesto.
Carson City, nv 89703 / Light shaking (MMI IV) / complex rolling (tilting in multiple directions) / 5-10 s : 2 story building swayed, trees and powerlines swayed.
Fair Oaks, Ca, near Sacramento / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : Heard creaking in the room I was in, then felt horizontal movement, lasting only a few seconds
Pioneer, CA / Light shaking (MMI IV)
Ceres / Moderate shaking (MMI V) / vertical swinging (up and down) / 2-5 s
Sacramento / Very weak shaking (MMI II) / vibration and rolling / 2-5 s : Slight shaking while laying down.
Manteca ca / Weak shaking (MMI III) / single lateral shake / 5-10 s
Gold River, Ca / Weak shaking (MMI III) / horizontal (sideways) swinging / 15-20 s
Fresno / Light shaking (MMI IV) / 10-15 s
San Ramon / Light shaking (MMI IV) / vertical swinging (up and down) / 1-2 s : Woke me up. 4 story building moved in jolting manner
London, United Kingdom / not felt : #Warship78 completes the 1st explosive event of Full Ship Shock Trials! The leadership and crew demonstrated #NavyReadiness fighting through the shock, proving our warship can 'take a hit. Ford’s shock trials are being conducted off the East Coast of the United States, within a narrow schedule that complies with environmental mitigation requirements, respecting known migration patterns of marine life in the test area.
Jaramillo Boquete (4358.8 km ESE of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 10-15 s : My house shaking windows moving in and out.
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