Earthquake near Mammoth Lakes, CA

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 11 km (7 mi) from the epicentre. In Mammoth Lakes, 24 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
3. Around the size people start to feel M 3.0 92× the energy of this one
4. This earthquake M 1.7 about 10 lb of TNT

Energy from the Gutenberg–Richter relation (log₁₀E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km since 2016 was M 4.4 on 2020-02-01 — about 12,000 times the energy of this one.

Before 2016, the USGS record lists 36 earthquakes of M5 or more within 50 km; the five largest:

1. 6.4 The 1986 Chalfant Valley, California Earthquake · 40 km ENE of this epicentre Jul 21, 1986
2. 6.2 9 km SW of Aspen Springs, California · 9 km NE of this epicentre May 27, 1980
3. 6.1 11 km WNW of Aspen Springs, California · 16 km NNE of this epicentre May 25, 1980
4. 6.1 8 km W of Aspen Springs, California · 13 km NNE of this epicentre May 25, 1980
5. 6.1 4 km NNW of Round Valley, California · 24 km E of this epicentre Nov 23, 1984

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 37.4482, -118.8807. Map © OpenStreetMap contributors.

Nearby places

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

52 earthquakes have been recorded within 50 km since this one.

1. 1.8 11km ESE of Mammoth Lakes, CA 06:43 UTC
2. 2.5 14km SE of Mammoth Lakes, CA 00:27 UTC
3. 1.8 10km WSW of Toms Place, CA 19:09 UTC
4. 1.7 14km SE of Mammoth Lakes, CA 02:36 UTC
5. 1.5 Central California 22:03 UTC
6. 2.4 19km WSW of Wilkerson, CA 02:41 UTC
7. 2.2 2km SSE of Round Valley, CA 05:54 UTC
8. 2.2 9km WSW of Toms Place, CA 18:07 UTC
9. 1.6 17 km NNW of Sunny Slopes, California 13:01 UTC
10. 1.5 3km SSE of Bishop, CA 12:41 UTC
11. 1.9 1km SSE of Dixon Lane-Meadow Creek, CA 23:31 UTC
12. 1.6 22km NE of North Fork, CA 19:34 UTC
13. 1.6 16km WSW of Toms Place, CA 01:33 UTC
14. 1.6 0km ENE of Bishop, CA 16:36 UTC
15. 1.9 9km WSW of Round Valley, CA 11:29 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 23:51 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

• The official USGS event page — the source of record for every value above
• Did you feel it? Report it to USGS — reports go to USGS, not to us
• ShakeMap for this event, when USGS has produced one

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.