Past earthquakes near Long Valley volcano: July 2021 - list, stats and map

Updated: Apr 20, 2024 00:26 GMT - refresh

During July 2021, Long Valley volcano has had 126 quakes of magnitudes up to 2.2:

2 quakes above magnitude 2
124 quakes below magnitude 2 that people normally don't feel.

Strongest: Mag. 2.2 Earthquake 9km WSW 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 (126 quakes):

Past earthquakes near Long Valley volcano: July 2021 - list, stats and map
Date and Time	Mag Depth	Distance	Location	Details
Jul 31, 2021 09:08 am (Los Angeles)	0.5 2.4 km	23 km (14 mi) to the SW	14km S of Mammoth Lakes, CA	Info
Jul 30, 2021 06:58 pm (Los Angeles)	1.2 6 km	16 km (10.2 mi) to the SE	10km W of Toms Place, CA	Info
Jul 30, 2021 05:11 pm (Los Angeles)	0.4 5.3 km	8.7 km (5.4 mi) to the S	6km E of Mammoth Lakes, CA	Info
Friday, July 30, 2021 GMT (2 quakes)
Jul 30, 2021 02:14 pm (Los Angeles)	0.4 1.8 km	11 km (7.1 mi) to the SW	2km NNW of Mammoth Lakes, CA	Info
Jul 30, 2021 02:33 am (GMT +0)	0.1 2.9 km	18 km (11 mi) to the S	15km W of Toms Place, CA	Info
Thursday, July 29, 2021 GMT (3 quakes)
Jul 29, 2021 06:13 pm (Universal Time)	0.3 2.6 km	17 km (10.3 mi) to the SW	5km SSW of Mammoth Lakes, CA	Info
Jul 29, 2021 02:44 am (Universal Time)	1.1 4.4 km	17 km (10.4 mi) to the S	13km SE of Mammoth Lakes, CA	Info
Jul 29, 2021 02:36 am (Universal Time)	1.7 3.5 km	18 km (11 mi) to the S	14km SE of Mammoth Lakes, CA	Info
Wednesday, July 28, 2021 GMT (2 quakes)
Jul 28, 2021 01:31 pm (Los Angeles)	0.3 2.1 km	14 km (8.7 mi) to the SW	3km S of Mammoth Lakes, CA	Info
Jul 28, 2021 12:28 pm (Universal Time)	0.5 5.7 km	8.8 km (5.5 mi) to the E	26km N of Toms Place, CA	Info
Tuesday, July 27, 2021 GMT (2 quakes)
Jul 27, 2021 01:14 pm (Universal Time)	0.5 5.3 km	7.5 km (4.7 mi) to the E	21km NNW of Toms Place, CA	Info

About these data

Estimated combined seismic energy released: 4.2 x 10⁸ joules (118 kilowatt hours, equivalent to 0.101 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)