Earthquake · reviewed by a seismologist
M 4.2mw
28km E of Trona, CA
- When
- Magnitude
- M 4.2 (mw)
- Depth
- 0.8 km below the surface
- Felt
- 106 reports · strongest reported intensity IV
- Measured shaking
- intensity VI (ShakeMap)
- USGS impact alert
- green
- Nearest
- Inyo County, 97 km NNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2780 days ago
This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 106 people have reported feeling it to USGS.
How big was it?
This earthquake released about 30 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 5,600× the energy of this one
- Mineral, Virginia 2011 M 5.8 250× the energy of this one
- Magna, Utah 2020 M 5.7 180× the energy of this one
- This earthquake M 4.2 about 30 tons of TNT
- Around the size people start to feel M 3.0 this one released 63× more
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.
Where
Epicentre 35.7303, -117.0777. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Inyo County, CA | 97 km (60 mi) | SSE of here | earthquakes near Inyo County |
| San Bernardino County, CA | 127 km (79 mi) | NW of here | earthquakes near San Bernardino County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
51 earthquakes have been recorded within 50 km since this one.
- 3.4 14km WSW of Searles Valley, CA
- 3.5 12km SW of Searles Valley, CA
- 4.1 12km SW of Searles Valley, CA
- 3.8 15km NE of Ridgecrest, CA
- 3.1 13km ENE of Ridgecrest, CA
- 3.7 12km SW of Searles Valley, CA
- 3.0 7km E of Ridgecrest, CA
- 3.4 14km ENE of Ridgecrest, CA
- 3.5 7km E of Ridgecrest, CA
- 3.5 8 km E of Ridgecrest, California
- 3.7 9km SW of Searles Valley, CA
- 3.9 14km W of Searles Valley, CA
- 3.2 15km SW of Searles Valley, CA
- 4.0 11km SSW of Searles Valley, CA
- 4.0 15km SW of Searles Valley, 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.
For this area
The largest earthquake within 50 km in our catalogue was M 4.1 on 2017-08-22.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
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.