QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

12 km SE of Manton, CA

· 8.9 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 45 kmShasta County 53 kmButte County 76 kmPlumas County 89 kmGlenn County 97 kmLassen County 107 kmTrinity County 118 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 2.1 (md)
Depth
8.9 km below the surface
Felt
no reports yet
Nearest
Tehama County, 45 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 894 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 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 40.3320, -121.7792. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 45 km (28 mi) ENE of here earthquakes near Tehama County
Shasta County, CA 53 km (33 mi) SSE of here earthquakes near Shasta County
Butte County, CA 76 km (47 mi) NNW of here earthquakes near Butte County
Plumas County, CA 89 km (56 mi) WNW of here earthquakes near Plumas County
Glenn County, CA 97 km (60 mi) NNE of here earthquakes near Glenn County
Lassen County, CA 107 km (66 mi) WSW of here earthquakes near Lassen County

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

Aftershocks so far

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

  1. 2.6 10 km NW of Shingletown, CA
  2. 2.4 27 km SW of Mineral, CA
  3. 1.7 10 km NW of Shingletown, CA
  4. 1.8 12 km NE of Shingletown, CA
  5. 2.9 23 km ENE of Viola, CA
  6. 1.5 23 km ENE of Viola, CA
  7. 1.9 23 km ENE of Viola, CA
  8. 1.6 25 km ENE of Viola, CA
  9. 2.2 16 km NE of Red Bluff, CA
  10. 1.9 18 km ENE of Red Bluff, CA
  11. 2.0 18 km NE of Red Bluff, CA
  12. 1.9 1 km ENE of Palo Cedro, CA
  13. 1.8 1 km E of Palo Cedro, CA
  14. 1.7 7 km SSE of Mineral, CA
  15. 1.6 6 km SE 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.