QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

15km E of Anderson, CA

· 21 km deep · released about 74 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 35 kmShasta County 38 kmTrinity County 88 kmGlenn County 95 kmButte County 95 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 2.3 (md)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Tehama County, 35 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2020 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 74 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 13× the energy of this one
  4. This earthquake M 2.3 about 74 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 40.4265, -122.1210. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 35 km (22 mi) NNE of here earthquakes near Tehama County
Shasta County, CA 38 km (23 mi) S of here earthquakes near Shasta County
Trinity County, CA 88 km (54 mi) ESE of here earthquakes near Trinity County
Glenn County, CA 95 km (59 mi) NNE of here earthquakes near Glenn County
Butte County, CA 95 km (59 mi) NNW of here earthquakes near Butte County
Plumas County, CA 120 km (75 mi) WNW of here earthquakes near Plumas 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. 1.7 1km NE of Shasta Lake, CA
  2. 1.7 13km NNE of Shingletown, CA
  3. 1.7 11km NNE of Bella Vista, CA
  4. 1.9 3km NE of Viola, CA
  5. 2.3 6km ENE of Shasta, CA
  6. 1.6 9km NE of Shasta Lake, CA
  7. 1.6 2km WNW of Shasta Lake, CA
  8. 1.8 12km NE of Bella Vista, CA
  9. 2.5 11km NNE of Bella Vista, CA
  10. 2.2 6km NW of Redding, CA
  11. 1.6 16km N of Shingletown, CA
  12. 1.7 4km ENE of Shasta, CA
  13. 2.5 4km ENE of Shasta, CA
  14. 1.8 4km E of Shasta, CA
  15. 1.7 4km NW of Bella Vista, 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.