Earthquake · reviewed by a seismologist
M 2.0md
21 km SW of Ambrose, CA
- When
- Magnitude
- M 2.0 (md)
- Depth
- -1.8 km below the surface
- Felt
- no reports yet
- Nearest
- Modoc County, 43 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1084 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 33 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 450,000× the energy of this one
- Magna, Utah 2020 M 5.7 320,000× the energy of this one
- Around the size people start to feel M 3.0 29× the energy of this one
- This earthquake M 2.0 about 33 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 41.3465, -121.1212. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Modoc County, CA | 43 km (27 mi) | SW of here | earthquakes near Modoc County |
| Lassen County, CA | 82 km (51 mi) | NNW of here | earthquakes near Lassen County |
| Shasta County, CA | 101 km (63 mi) | NE of here | earthquakes near Shasta County |
| Siskiyou County, CA | 121 km (75 mi) | ESE of here | earthquakes near Siskiyou County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
10 earthquakes have been recorded within 50 km since this one.
- 1.6 25 km NW of McArthur, CA
- 1.8 31 km E of Tennant, CA
- 1.9 24 km E of Tennant, CA
- 2.1 9 km SE of McArthur, CA
- 1.8 34 km SSE of Tennant, CA
- 2.4 14 km SE of McArthur, CA
- 1.9 17 km N of McArthur, CA
- 2.4 4 km W of McArthur, CA
- 2.1 8 km SE of McArthur, CA
- 2.2 21 km SW of Ambrose, 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.