Earthquake · reviewed by a seismologist
M 2.2md
Earthquake near Greenville, CA
No earthquake was likely felt in Greenville in the 24 hours to 3:34 am PST (11:34 UTC). The last one was M 2.3, 18 km (11 mi) SSE, at 5:11 am PST on 7 November 2026, estimated intensity II (weak) in town. Every earthquake near Greenville
This page: a magnitude 2.2 earthquake was recorded 9 km (6 mi) west-northwest of Greenville, CA, at 1:16 am PDT on 10 April 2021 (08:16 UTC), 5.0 km deep.
USGS: 3km ENE of Canyondam, CA
- When
- 1:16 am PDT on 10 April 2021 ()
- Where
- 9 km (6 mi) west-northwest of Greenville, CA · earthquakes near Greenville
- Magnitude
- M 2.2 (md)
- Depth
- 5.0 km below the surface
- Felt
- no reports yet
- Nearest
- Plumas County, 28 km SE
- Nearest mapped fault
- Almanor fault, 3 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2031 days ago
Earthquake alerts for Greenville, CA
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This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 18 km (11 mi) from the epicentre. In Greenville, 9 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Likely felt in: Greenville 9 km, intensity II · Westwood 14 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 56 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 270,000× the energy of this one
- Magna, Utah 2020 M 5.7 190,000× the energy of this one
- Around the size people start to feel M 3.0 17× the energy of this one
- This earthquake M 2.2 about 56 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.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:
- 5.7 2 km NNE of Canyondam, California · 1 km NW of this epicentre
- 5.5 15 km NE of Mineral, California · 46 km NW of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 40.1833, -121.0467. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Plumas County, CA | 28 km (18 mi) | SE | earthquakes near Plumas County |
| Lassen County, CA | 69 km (43 mi) | NNE | earthquakes near Lassen County |
| Butte County, CA | 75 km (46 mi) | SW | earthquakes near Butte County |
| Sierra County, CA | 81 km (50 mi) | SE | earthquakes near Sierra County |
| Tehama County, CA | 101 km (63 mi) | W | earthquakes near Tehama County |
| Nevada County, CA | 101 km (63 mi) | SSE | earthquakes near Nevada County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
47 earthquakes have been recorded within 50 km since this one.
- 1.5 3 km SSE of Greenhorn, California
- 2.4 16km SSE of Mineral, CA
- 1.7 12km WSW of Chester, CA
- 1.5 8km SSE of Mineral, CA
- 1.6 12km W of Chester, CA
- 1.7 7km SSE of Mineral, CA
- 2.8 2km NE of Almanor, CA
- 1.6 9km S of Mineral, CA
- 2.2 3km WSW of Cromberg, CA
- 2.1 3km NNE of Chester, CA
- 2.7 5km ENE of East Quincy, CA
- 1.8 3km NNE of Chester, CA
- 2.1 3km NNE of Chester, CA
- 2.1 6km SW of Cromberg, CA
- 1.9 13km WSW 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.
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.