Earthquake · reviewed by a seismologist
M 2.9ml
Earthquake near Mammoth Lakes, CA
No earthquake was likely felt in Mammoth Lakes in the 24 hours to 8:11 am PST (16:11 UTC). The last one was M 2.9, 26 km (16 mi) SSE, at 3:54 am PDT on 24 October 2026, estimated intensity II (weak) in town. Every earthquake near Mammoth Lakes
This page: a magnitude 2.9 earthquake was recorded 50 km (31 mi) north-northeast of Mammoth Lakes, CA, at 12:20 am PDT on 12 April 2020 (07:20 UTC), 4.2 km deep.
USGS: 30km SE of Bodie, CA
- When
- 12:20 am PDT on 12 April 2020 ()
- Where
- 50 km (31 mi) north-northeast of Mammoth Lakes, CA · earthquakes near Mammoth Lakes
- Magnitude
- M 2.9 (ml)
- Depth
- 4.2 km below the surface
- Felt
- no reports yet
- Measured shaking
- intensity III (ShakeMap)
- Nearest
- Mono County, 20 km SW
- Nearest mapped fault
- Huntoon Valley fault system, 3 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2326 days ago
Earthquake alerts for Mammoth Lakes, CA
Get a notification in this browser when USGS records an earthquake near Mammoth Lakes, CA. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 33 km (21 mi) from the epicentre. In Mammoth Lakes, 50 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 750 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 20,000× the energy of this one
- Magna, Utah 2020 M 5.7 14,000× the energy of this one
- Around the size people start to feel M 3.0 1.3× the energy of this one
- This earthquake M 2.9 about 750 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 5.6 on 2016-12-28 — about 10,000 times the energy of this one.
Before 2016, the USGS record lists 25 earthquakes of M5 or more within 50 km; the five largest:
- 6.3 The 1934 Excelsior Mountains, Nevada Earthquake · 41 km NE of this epicentre
- 6.0 7 km ENE of Mammoth Lakes, California · 45 km SSW of this epicentre
- 5.9 8 km NNE of Mammoth Lakes, California · 42 km SSW of this epicentre
- 5.8 3 km NE of Mono City, California · 34 km W of this epicentre
- 5.7 12 km ESE of Mammoth Lakes, California · 49 km S of this epicentre
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 38.0540, -118.7273. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Mono County, CA | 20 km (12 mi) | SW | earthquakes near Mono County |
| Mineral County, NV | 58 km (36 mi) | NNE | earthquakes near Mineral County |
| Esmeralda County, NV | 101 km (63 mi) | ESE | earthquakes near Esmeralda County |
| Tuolumne County, CA | 108 km (67 mi) | W | earthquakes near Tuolumne County |
| Alpine County, CA | 113 km (70 mi) | NW | earthquakes near Alpine County |
| Lyon County, NV | 115 km (72 mi) | NNW | earthquakes near Lyon County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
60 earthquakes have been recorded within 50 km since this one.
- 1.5 29km SE of Bodie, CA
- 1.7 29km SE of Bodie, CA
- 2.2 30km SE of Bodie, CA
- 1.7 29km SE of Bodie, CA
- 1.9 29km SE of Bodie, CA
- 1.9 30km SE of Bodie, CA
- 1.6 30km SE of Bodie, CA
- 1.5 30km SE of Bodie, CA
- 1.6 30km SE of Bodie, CA
- 1.6 30km SE of Bodie, CA
- 1.7 30km SE of Bodie, CA
- 1.6 30km SE of Bodie, CA
- 2.1 29km SE of Bodie, CA
- 1.6 30km SE of Bodie, CA
- 1.6 30km SE of Bodie, CA
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . 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.