QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

21km SE of Burney, CA

· 8.9 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 46 kmLassen County 74 kmTehama County 92 kmPlumas County 101 kmModoc County 115 kmButte County 120 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
Shasta County, 46 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2586 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 40.7395, -121.4995. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 46 km (29 mi) E of here earthquakes near Shasta County
Lassen County, CA 74 km (46 mi) W of here earthquakes near Lassen County
Tehama County, CA 92 km (57 mi) NE of here earthquakes near Tehama County
Plumas County, CA 101 km (63 mi) NW of here earthquakes near Plumas County
Modoc County, CA 115 km (72 mi) SW of here earthquakes near Modoc County
Butte County, CA 120 km (74 mi) N of here earthquakes near Butte County

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

Aftershocks so far

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

  1. 2.2 9km NW of Chester, CA
  2. 1.9 9km NW of Chester, CA
  3. 2.0 10km N of Viola, CA
  4. 1.5 10km N of Viola, CA
  5. 1.8 12km NNE of Shingletown, CA
  6. 2.0 10km N of Viola, CA
  7. 2.1 10km N of Viola, CA
  8. 2.8 10km N of Viola, CA
  9. 2.0 10km N of Viola, CA
  10. 1.9 12km ENE of Mineral, CA
  11. 1.5 12km N of Mineral, CA
  12. 2.3 10km NNW of Viola, CA
  13. 1.6 7km SSW of Big Bend, CA
  14. 1.7 7km SSW of Big Bend, CA
  15. 1.8 11km NW of Shingletown, 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.