Earthquake · reviewed by a seismologist
M 2.4md
2km ESE of Prattville, CA
- When
- Magnitude
- M 2.4 (md)
- Depth
- 4.2 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Plumas County, 35 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2480 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.
How big was it?
This earthquake released about 100 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 150,000× the energy of this one
- Magna, Utah 2020 M 5.7 110,000× the energy of this one
- Around the size people start to feel M 3.0 9.4× the energy of this one
- This earthquake M 2.4 about 100 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 40.2020, -121.1293. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Plumas County, CA | 35 km (22 mi) | NW of here | earthquakes near Plumas County |
| Lassen County, CA | 71 km (44 mi) | SW of here | earthquakes near Lassen County |
| Butte County, CA | 72 km (45 mi) | NE of here | earthquakes near Butte County |
| Sierra County, CA | 87 km (54 mi) | NW of here | earthquakes near Sierra County |
| Tehama County, CA | 94 km (58 mi) | E of here | earthquakes near Tehama County |
| Shasta County, CA | 99 km (62 mi) | SE of here | earthquakes near Shasta County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 1.5 1km WNW of Canyondam, CA
- 1.9 5km NE of Greenhorn, CA
- 2.5 4km NE of Greenhorn, CA
- 2.0 3km E of Prattville, CA
- 1.9 6km SE of Chester, CA
- 1.8 2km SSW of Canyondam, CA
- 1.7 7km NNW of Belden, CA
- 1.6 19km NW of Storrie, CA
- 1.6 4km SE of Canyondam, CA
- 1.9 5km ESE of Chester, CA
- 1.8 6km N of Almanor, CA
- 1.9 12km ENE of Mineral, CA
- 1.6 4km NE of Canyondam, CA
- 1.5 12km N of Mineral, CA
- 1.6 7km S of Mineral, 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.