Earthquake · reviewed by a seismologist
M 1.5md
34 km WNW of Rancho Tehama Reserve, California
- When
- Magnitude
- M 1.5 (md)
- Depth
- 12 km below the surface
- Felt
- no reports yet
- Nearest
- Tehama County, 44 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3226 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 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
- Around the size people start to feel M 3.0 170× the energy of this one
- This earthquake M 1.5 about 5.6 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 40.1613, -122.7518. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Tehama County, CA | 44 km (28 mi) | W of here | earthquakes near Tehama County |
| Trinity County, CA | 62 km (39 mi) | SSE of here | earthquakes near Trinity County |
| Glenn County, CA | 69 km (43 mi) | NNW of here | earthquakes near Glenn County |
| Shasta County, CA | 90 km (56 mi) | SW of here | earthquakes near Shasta County |
| Mendocino County, CA | 100 km (62 mi) | NE of here | earthquakes near Mendocino County |
| Butte County, CA | 112 km (70 mi) | WNW of here | earthquakes near Butte County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
44 earthquakes have been recorded within 50 km since this one.
- 1.5 19km NNW of Alder Springs, CA
- 2.4 14km W of Red Bluff, CA
- 2.0 37km NNE of Covelo, CA
- 2.2 40km NE of Covelo, CA
- 1.8 28km NNW of Alder Springs, CA
- 1.6 20km N of Covelo, CA
- 1.9 35km WNW of Rancho Tehama Reserve, CA
- 1.6 28km WSW of Rancho Tehama Reserve, CA
- 1.7 42km NW of Rancho Tehama Reserve, CA
- 2.3 15km NW of Alder Springs, CA
- 2.9 14km NW of Alder Springs, CA
- 1.7 40km NE of Covelo, CA
- 2.4 41km NE of Covelo, CA
- 1.8 39km NE of Covelo, CA
- 1.8 32km NNW of Alder Springs, 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.