Earthquake · reviewed by a seismologist
M 2.3md
2km WSW of Anderson, CA
- When
- Magnitude
- M 2.3 (md)
- Depth
- 56 km below the surface
- Felt
- no reports yet
- Nearest
- Tehama County, 35 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2647 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 74 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 13× the energy of this one
- This earthquake M 2.3 about 74 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 40.4370, -122.3200. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Tehama County, CA | 35 km (22 mi) | NNW of here | earthquakes near Tehama County |
| Shasta County, CA | 43 km (27 mi) | SSW of here | earthquakes near Shasta County |
| Trinity County, CA | 71 km (44 mi) | ESE of here | earthquakes near Trinity County |
| Glenn County, CA | 93 km (58 mi) | N of here | earthquakes near Glenn County |
| Butte County, CA | 105 km (65 mi) | NW of here | earthquakes near Butte County |
| Mendocino County, CA | 147 km (91 mi) | NE of here | earthquakes near Mendocino County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
57 earthquakes have been recorded within 50 km since this one.
- 1.6 5km ESE of Redding, CA
- 1.7 4km SE of Redding, CA
- 1.6 1km N of Shasta, CA
- 2.0 16km NW of Viola, CA
- 1.8 6km NNE of Gerber, CA
- 1.7 9km NE of Shasta Lake, CA
- 1.6 20km NE of Red Bluff, CA
- 1.6 20km NE of Red Bluff, CA
- 1.7 18km NE of Red Bluff, CA
- 1.9 15km ESE of Anderson, CA
- 2.5 17km SE of Anderson, CA
- 1.9 18km ESE of Anderson, CA
- 1.7 17km SE of Anderson, CA
- 1.9 18km ESE of Anderson, CA
- 2.5 18km ESE of Anderson, 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.