QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

15km WSW of Chester, CA

· 5.5 km deep · released about 58 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 54 kmButte County 66 kmTehama County 73 kmShasta County 81 kmLassen County 83 kmSierra County 104 kmYuba County 107 kmGlenn County 112 kmNevada County 117 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.2 (md)
Depth
5.5 km below the surface
Felt
no reports yet
Nearest
Plumas County, 54 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2530 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 58 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.

  1. Mineral, Virginia 2011 M 5.8 260,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 58 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 40.2357, -121.3793. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 54 km (34 mi) WNW of here earthquakes near Plumas County
Butte County, CA 66 km (41 mi) NNE of here earthquakes near Butte County
Tehama County, CA 73 km (46 mi) E of here earthquakes near Tehama County
Shasta County, CA 81 km (50 mi) SE of here earthquakes near Shasta County
Lassen County, CA 83 km (52 mi) SW of here earthquakes near Lassen County
Sierra County, CA 104 km (64 mi) NW of here earthquakes near Sierra County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

50 earthquakes have been recorded within 50 km since this one.

  1. 1.6 4km SE of Canyondam, CA
  2. 1.9 5km ESE of Chester, CA
  3. 1.8 6km N of Almanor, CA
  4. 1.9 12km ENE of Mineral, CA
  5. 1.6 4km NE of Canyondam, CA
  6. 1.5 12km N of Mineral, CA
  7. 1.6 7km S of Mineral, CA
  8. 1.5 5km WSW of Manton, CA
  9. 2.2 5km N of Almanor, CA
  10. 2.3 10km NNW of Viola, CA
  11. 1.6 7km NNW of Greenville, CA
  12. 1.5 8km NE of East Shore, CA
  13. 1.5 8km ENE of Hamilton Branch, CA
  14. 1.5 2km W of Almanor, CA
  15. 1.6 3km NE of Canyondam, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.