Earthquake · reviewed by a seismologist
M 5.2mw
4km NW of Canyondam, CA
- When
- Magnitude
- M 5.2 (mw)
- Depth
- 6.1 km below the surface
- Felt
- 1350 reports · strongest reported intensity VI
- Measured shaking
- intensity VII (ShakeMap)
- USGS impact alert
- green
- Nearest
- Plumas County, 33 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1163 days ago
This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 1350 people have reported feeling it to USGS.
How big was it?
This earthquake released about 830 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.2 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 200× the energy of this one
- Mineral, Virginia 2011 M 5.8 9.1× the energy of this one
- Magna, Utah 2020 M 5.7 6.5× the energy of this one
- This earthquake M 5.2 about 830 tons of TNT
- Around the size people start to feel M 3.0 this one released 1,700× more
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 40.1960, -121.0998. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Plumas County, CA | 33 km (20 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 | 73 km (45 mi) | NE of here | earthquakes near Butte County |
| Sierra County, CA | 85 km (53 mi) | NW of here | earthquakes near Sierra County |
| Tehama County, CA | 97 km (60 mi) | E of here | earthquakes near Tehama County |
| Shasta County, CA | 102 km (63 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
60 earthquakes have been recorded within 50 km since this one.
- 1.6 4km NE of Prattville, CA
- 2.2 1km NE of Prattville, CA
- 1.9 3km NE of Almanor, CA
- 1.9 4km ENE of Prattville, CA
- 2.3 3km ENE of Prattville, CA
- 2.3 2km NE of Almanor, CA
- 2.4 0km NW of Prattville, CA
- 3.2 2km NNE of Almanor, CA
- 1.9 1km NNE of Prattville, CA
- 2.6 3km NNE of Prattville, CA
- 1.8 2km NNE of Almanor, CA
- 2.5 3km NNE of Almanor, CA
- 2.0 4km NNW of Almanor, CA
- 1.8 4km ESE of Prattville, CA
- 2.6 2km NE of Almanor, 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.
For this area
The largest earthquake within 50 km in our catalogue was M 5.5 on 2023-05-11 — it released about 3 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
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.