Earthquake · reviewed by a seismologist
M 2.7md
4 km SSE of Anderson, CA
- When
- Magnitude
- M 2.7 (md)
- Depth
- 17 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Tehama County, 33 km S
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 27 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.
How big was it?
This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
- Magna, Utah 2020 M 5.7 32,000× the energy of this one
- Around the size people start to feel M 3.0 2.8× the energy of this one
- This earthquake M 2.7 about 340 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 40.4190, -122.2808. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Tehama County, CA | 33 km (20 mi) | N of here | earthquakes near Tehama County |
| Shasta County, CA | 43 km (27 mi) | SSW of here | earthquakes near Shasta County |
| Trinity County, CA | 75 km (47 mi) | ESE of here | earthquakes near Trinity County |
| Glenn County, CA | 91 km (57 mi) | N of here | earthquakes near Glenn County |
| Butte County, CA | 102 km (63 mi) | NW of here | earthquakes near Butte County |
| Mendocino County, CA | 148 km (92 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
6 earthquakes have been recorded within 50 km since this one.
- 2.7 22 km SSW of Manton, CA
- 1.7 9 km ENE of Shingletown, CA
- 1.9 4 km ESE of Bella Vista, CA
- 1.9 16 km NE of Red Bluff, CA
- 1.7 20 km NNE of Shasta Lake, CA
- 2.5 9 km E of Rancho Tehama Reserve, 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.