Earthquake · reviewed by a seismologist
M 2.3md
15km NW of Chester, CA
- When
- Magnitude
- M 2.3 (md)
- Depth
- 5.8 km below the surface
- Felt
- no reports yet
- Nearest
- Plumas County, 65 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1426 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 77 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
- Magna, Utah 2020 M 5.7 140,000× the energy of this one
- Around the size people start to feel M 3.0 12× the energy of this one
- This earthquake M 2.3 about 77 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.
Where
Epicentre 40.4048, -121.3595. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Plumas County, CA | 65 km (40 mi) | NW of here | earthquakes near Plumas County |
| Shasta County, CA | 70 km (44 mi) | SE of here | earthquakes near Shasta County |
| Lassen County, CA | 71 km (44 mi) | WSW of here | earthquakes near Lassen County |
| Tehama County, CA | 80 km (50 mi) | ENE of here | earthquakes near Tehama County |
| Butte County, CA | 85 km (53 mi) | NNE of here | earthquakes near Butte County |
| Sierra County, CA | 116 km (72 mi) | NW of here | earthquakes near Sierra County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
55 earthquakes have been recorded within 50 km since this one.
- 2.5 2km NNE of Almanor, CA
- 3.0 4km NW of Canyondam, CA
- 2.4 4km ESE of Prattville, CA
- 2.3 4km NNW of Canyondam, CA
- 2.2 4km NNW of Canyondam, CA
- 2.8 4km NNW of Canyondam, CA
- 2.2 2km NNE of Prattville, CA
- 2.4 4km ESE of Prattville, CA
- 3.8 4km NW of Canyondam, CA
- 2.7 2km NE of Almanor, CA
- 2.4 2km ENE of Prattville, CA
- 2.3 2km N of Prattville, CA
- 2.4 4km NW of Canyondam, CA
- 1.9 4km NNE of Prattville, CA
- 2.3 2km NE of Almanor, 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.