Earthquake · reviewed by a seismologist
M 2.7md
28km SSE of Somes Bar, CA
- When
- Magnitude
- M 2.7 (md)
- Depth
- 40 km below the surface
- Felt
- no reports yet
- Nearest
- Trinity County, 59 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2544 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
How big was it?
This earthquake released about 320 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 48,000× the energy of this one
- Magna, Utah 2020 M 5.7 34,000× the energy of this one
- Around the size people start to feel M 3.0 3× the energy of this one
- This earthquake M 2.7 about 320 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 41.1503, -123.3377. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Trinity County, CA | 59 km (37 mi) | NNW of here | earthquakes near Trinity County |
| Humboldt County, CA | 70 km (43 mi) | NE of here | earthquakes near Humboldt County |
| Siskiyou County, CA | 83 km (52 mi) | SW of here | earthquakes near Siskiyou County |
| Del Norte County, CA | 86 km (53 mi) | SE of here | earthquakes near Del Norte County |
| Shasta County, CA | 117 km (73 mi) | WNW of here | earthquakes near Shasta County |
| Tehama County, CA | 147 km (91 mi) | NW of here | earthquakes near Tehama County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 2.7 6km S of Weitchpec, CA
- 2.2 22km SSE of Willow Creek, CA
- 2.3 22km SSE of Willow Creek, CA
- 2.2 22km SSE of Willow Creek, CA
- 3.5 16km NE of Willow Creek, CA
- 3.0 19km SE of Willow Creek, CA
- 2.4 11km WSW of Willow Creek, CA
- 2.6 5km SW of Somes Bar, CA
- 2.2 24km NW of Hayfork, CA
- 2.8 7km W of Weitchpec, CA
- 2.9 29km ENE of Willow Creek, CA
- 2.3 10km SE of Willow Creek, CA
- 2.2 9km ESE of Willow Creek, CA
- 2.4 21km SSE of Willow Creek, CA
- 2.5 16km SSE of Somes Bar, 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.