QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

11km NW of Cedarville, CA

· 4.4 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Modoc County 38 kmLassen County 103 kmWashoe County 109 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
4.4 km below the surface
Felt
no reports yet
Nearest
Modoc County, 38 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1612 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 60 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 5.8 250,000× 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 60 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 41.6023, -120.2593. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Modoc County, CA 38 km (24 mi) E of here earthquakes near Modoc County
Lassen County, CA 103 km (64 mi) NNE of here earthquakes near Lassen County
Washoe County, NV 109 km (68 mi) NNW of here earthquakes near Washoe County

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

Aftershocks so far

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

  1. 1.6 11 km E of Eagleville, California
  2. 1.5 28 km SW of New Pine Creek, California
  3. 1.8 31 km ESE of Fort Bidwell, California
  4. 1.5 31 km ESE of Fort Bidwell, California
  5. 1.9 31 km ESE of Fort Bidwell, California
  6. 2.0 30 km ESE of Fort Bidwell, California
  7. 2.1 12 km SW of Lake City, California
  8. 2.3 21 km NNE of Cedarville, CA
  9. 1.6 14 km SE of Eagleville, California
  10. 1.6 36 km E of Cedarville, California
  11. 2.1 13 km SE of Alturas, California
  12. 1.6 29 km ENE of Eagleville, California
  13. 1.9 Northern California
  14. 1.8 5 km ENE of Lake City, California
  15. 1.6 9 km E of Lake City, California

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.