QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

4km W of Bella Vista, CA

· 20 km deep · released about 46 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 24 kmTehama County 58 kmTrinity County 70 kmSiskiyou County 107 kmGlenn County 116 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
20 km below the surface
Felt
no reports yet
Nearest
Shasta County, 24 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2376 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 46 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 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 40.6427, -122.2805. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 24 km (15 mi) WSW of here earthquakes near Shasta County
Tehama County, CA 58 km (36 mi) N of here earthquakes near Tehama County
Trinity County, CA 70 km (44 mi) E of here earthquakes near Trinity County
Siskiyou County, CA 107 km (67 mi) SSE of here earthquakes near Siskiyou County
Glenn County, CA 116 km (72 mi) N of here earthquakes near Glenn County
Butte County, CA 123 km (76 mi) NNW of here earthquakes near Butte 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. 1.9 21km SE of Anderson, CA
  2. 1.6 23km N of Shasta Lake, CA
  3. 2.0 2km ENE of Montgomery Creek, CA
  4. 1.9 28km N of Shasta Lake, CA
  5. 1.6 6km WNW of Palo Cedro, CA
  6. 1.5 12km W of Shingletown, CA
  7. 3.0 13km W of Shingletown, CA
  8. 1.5 16km NNW of Shingletown, CA
  9. 2.1 26km N of Shasta Lake, CA
  10. 1.9 25km N of Shasta Lake, CA
  11. 1.8 13km NNE of Shingletown, CA
  12. 2.3 15km E of Anderson, CA
  13. 1.6 19km NW of Viola, CA
  14. 2.8 25km NNW of Shasta Lake, CA
  15. 1.9 2km SSW of Shasta Lake, 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.