Earthquake · reviewed by a seismologist
M 1.9md
21km W of Rancho Tehama Reserve, CA
- When
- Magnitude
- M 1.9 (md)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Tehama County, 39 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2479 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
- Magna, Utah 2020 M 5.7 500,000× the energy of this one
- Around the size people start to feel M 3.0 45× the energy of this one
- This earthquake M 1.9 about 21 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 39.9850, -122.6460. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Tehama County, CA | 39 km (24 mi) | WSW of here | earthquakes near Tehama County |
| Glenn County, CA | 47 km (29 mi) | NNW of here | earthquakes near Glenn County |
| Trinity County, CA | 84 km (52 mi) | SSE of here | earthquakes near Trinity County |
| Mendocino County, CA | 92 km (57 mi) | NE of here | earthquakes near Mendocino County |
| Butte County, CA | 96 km (60 mi) | WNW of here | earthquakes near Butte County |
| Colusa County, CA | 96 km (60 mi) | NNW of here | earthquakes near Colusa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
30 earthquakes have been recorded within 50 km since this one.
- 2.7 41km NNE of Covelo, CA
- 2.2 27km WSW of Rancho Tehama Reserve, CA
- 2.2 42km NE of Covelo, CA
- 2.4 6km ESE of Red Bluff, CA
- 2.3 41km NE of Covelo, CA
- 1.9 37km NE of Covelo, CA
- 2.4 2km ENE of Gerber, CA
- 1.6 19km NE of Covelo, CA
- 2.2 6km SE of Corning, CA
- 2.3 6km SE of Corning, CA
- 2.2 41km SE of Hayfork, CA
- 1.9 41km NE of Covelo, CA
- 1.8 30km NE of Covelo, CA
- 1.6 24km NW of Alder Springs, CA
- 2.6 23km NW 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.