Past earthquakes near Long Valley volcano: October 2020 - list, stats and map

Updated: Apr 23, 2024 14:52 GMT - refresh

During October 2020, Long Valley volcano has had 202 quakes of magnitudes up to 3.5:

1 quake above magnitude 3
6 quakes between magnitude 2 and 3
195 quakes below magnitude 2 that people normally don't feel.

Strongest: Mag. 3.5 Earthquake 15km SW of Toms Place, CA -

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Quakes, magnitude and depth over time

Depth and magnitude of quakes over time

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Showing quakes magnitude 0.5 or higher, within up to 30 km (19 mi) distance (204 quakes):

Past earthquakes near Long Valley volcano: October 2020 - list, stats and map
Date and Time	Mag Depth	Distance	Location	Details
Oct 31, 2020 04:08 pm (Los Angeles)	0.7 3.2 km	6.3 km (3.9 mi) to the SW	3.7 miles E of Mammoth Lakes, California	Info
Oct 31, 2020 03:57 pm (Los Angeles)	0.4 2.7 km	6.3 km (3.9 mi) to the SW	3.8 miles E of Mammoth Lakes, California	Info
Oct 31, 2020 03:01 pm (Los Angeles)	0.9 0.8 km	16 km (9.8 mi) to the SW	3.3 miles WSW of Mammoth Lakes, California	Info
Friday, October 30, 2020 GMT (4 quakes)
Oct 30, 2020 06:13 am (Los Angeles)	0.8 3 km	19 km (12 mi) to the S	9.8 miles SSE of Mammoth Lakes, California	Info
Oct 30, 2020 03:25 am (Los Angeles)	0.7 2.6 km	23 km (14 mi) to the S	12 miles SSE of Mammoth Lakes, California	Info
Oct 29, 2020 11:33 pm (Los Angeles)	0.7 9.8 km	20 km (12 mi) to the S	10.2 miles SSE of Mammoth Lakes, California	Info
Oct 29, 2020 11:07 pm (Los Angeles)	0.9 1.7 km	12 km (7.6 mi) to the S	4.5 miles SE of Mammoth Lakes, California	Info
Thursday, October 29, 2020 GMT (4 quakes)
Oct 29, 2020 11:58 am (Los Angeles)	0.6 4.5 km	23 km (14 mi) to the S	12 miles SSE of Mammoth Lakes, California	Info
Oct 29, 2020 04:39 am (Los Angeles)	0.1 0.6 km	15 km (9.1 mi) to the SW	4km W of Mammoth Lakes, CA	Info
Oct 28, 2020 11:05 pm (Los Angeles)	0.2 1 km	16 km (9.8 mi) to the SW	5km W of Mammoth Lakes, CA, USA	Info
Oct 28, 2020 09:26 pm (Los Angeles)	0.3 0.1 km	14 km (8.7 mi) to the W	4km NW of Mammoth Lakes, CA, USA	Info

About these data

Estimated combined seismic energy released: 1.3 x 10¹⁰ joules (3.67 megawatt hours, equivalent to 3.16 tons of TNT) | about seismic energy

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Long Valley volcano (California) activity update

Map of recent quakes at the Long Valley caldera (California)

Normal seismic activity with numerous tiny earthquakes continues to occur at the southern and western parts of the caldera as well as under Mammoth mountain. There are no signs of a possible eruption in a near future. ... Read all

Sun, 31 Mar 2013, 10:53

Long Valley caldera (California): felt magnitude 3.8 earthquake

Some felt earthquakes have occurred recently along the southern boundary of Long Valley Caldera, the latest a 3.8 magnitude quakes yesterday. This is not unusual for the volcanic system and does not mean any volcanic eruption should be expected in a near future. The alert status remains green (normal). ... Read all

Simplified geologic map for Long Valley Caldera and the Mono-Inyo Craters volcanic chain (based on Bailey, 1989) CD, Casa Diablo; HC Hot Cree; HCF Hiloton Creek Fault; HSF, Hartley Springs Fault; LCF, Laurel Creek Fault; MLF, Mono Lake Fault; SLF, Silver Lake Fault; WCF, Wheeler Crest Fault. (source: USGS)