Moderate mag. 3.9 earthquake - 30 mi northeast of Mammoth Lakes, Mono County, California, USA, on Friday, 15 Jan 2021 2:11 pm (GMT -8) -
Moderate magnitude 3.9 earthquake at 8 km depth
15 Jan 22:14 UTC: First to report: USGS after 4 minutes.
15 Jan 22:17: Magnitude recalculated from 4.0 to 3.9.
15 Jan 23:30: Hypocenter depth recalculated from 1.1 to 7.7 km (from 0.7 to 4.8 mi).
Update Fri, 15 Jan 2021, 22:18Small earthquake of magnitude 3.9 just reported 30 miles northeast of Mammoth Lakes, California, United States
3.9 quake 15 Jan 2:11 pm (GMT -8)
Just 7 minutes ago, a 3.9-magnitude earthquake struck near Mammoth Lakes, Mono County, California, USA. The tremor was recorded early afternoon on Friday 15 January 2021 at 2:11 pm local time, at a very shallow depth of 0.7 miles below the surface.
The event was filed by the United States Geological Survey (USGS), 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 3.8 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 Benton (pop. 280) located 7 miles from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Mammoth Lakes (pop. 7,900) located 30 miles from the epicenter, June Lake (pop. 630) 31 miles away, Dixon Lane-Meadow Creek (pop. 2,600) 37 miles away, Dixon Lane-Meadow Creek (pop. 2,600) 37 miles away, West Bishop (pop. 2,600) 38 miles away, and Hawthorne (pop. 3,300) 42 miles away.
Download the Volcanoes & Earthquakes app
to get one of the fastest seismic alerts online:Android
Date & time: 15 Jan 2021 22:11:07 UTC -
Local time at epicenter:
Friday, 15 Jan 2021 2:11 pm (GMT -8)
Depth: 7.7 km
Epicenter latitude / longitude: 37.91067°N / 118.5385°W
, United States
Nearest volcano: Long Valley
(37 km / 23 mi)
Nearby towns and cities:12 km (7 mi) NNW of Benton
(pop: 280) --> See nearby quakes!48 km (30 mi) NE of Mammoth Lakes
(pop: 7,950) --> See nearby quakes!59 km (37 mi) N of Dixon Lane-Meadow Creek
(pop: 2,650) --> See nearby quakes!69 km (43 mi) S of Hawthorne (Nevada)
(pop: 3,270) --> See nearby quakes!86 km (53 mi) NNW of Big Pine
(pop: 1,760) --> See nearby quakes!159 km (99 mi) NE of Clovis
(pop: 104,200) --> See nearby quakes!161 km (100 mi) NNE of Sanger (Fresno County)
(pop: 25,000) --> See nearby quakes!169 km (105 mi) NE of Fresno
(pop: 520,100) --> See nearby quakes!171 km (106 mi) NE of Madera
(pop: 64,200) --> See nearby quakes!269 km (167 mi) ESE of Sacramento
(pop: 490,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 19.8°C
(68 F), humidity: 13%, wind: 2 m/s (4 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||7.7 km||41km NNE of Toms Place, CA, USA||USGS|
|3.7||8 km||CENTRAL CALIFORNIA, USA||EMSC|
User reports for this quake (2)
Silver Peak NV (81 km E of epicenter) [Map]
/ Very weak shaking (MMI II) / single vertical bump / 2-5 s (reported through our app)
SILVERPEAK NV (81 km E of epicenter) [Map]
/ not felt / complex rolling (tilting in multiple directions) (reported through our app)
Earlier earthquakes in the same area
Click here to search our database for earlier earthquakes in the same area since 1900!