QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

13km SE of Mineral, CA

· -0.0 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 62 kmTehama County 70 kmButte County 70 kmShasta County 73 kmLassen County 84 kmSierra County 111 kmGlenn County 112 kmYuba County 113 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
-0.0 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Plumas County, 62 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3184 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

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 40.2863, -121.4410. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 62 km (38 mi) WNW of here earthquakes near Plumas County
Tehama County, CA 70 km (43 mi) ENE of here earthquakes near Tehama County
Butte County, CA 70 km (44 mi) NNE of here earthquakes near Butte County
Shasta County, CA 73 km (46 mi) SE of here earthquakes near Shasta County
Lassen County, CA 84 km (52 mi) SW of here earthquakes near Lassen County
Sierra County, CA 111 km (69 mi) NW of here earthquakes near Sierra 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 2km NE of Almanor, CA
  2. 1.7 4km WSW of Canyondam, CA
  3. 1.6 7km ESE of East Shore, CA
  4. 2.2 2km NNE of Indian Falls, CA
  5. 1.5 6 km SW of Canyondam, California
  6. 2.2 3km SE of Belden, CA
  7. 1.5 3 km SSW of Greenville, California
  8. 1.5 8km NNW of Chester, CA
  9. 2.0 14km NW of Viola, CA
  10. 2.9 3km NNE of Almanor, CA
  11. 2.3 4km NNE of Almanor, CA
  12. 1.9 13km NNE of Mineral, CA
  13. 2.0 23km SE of Burney, CA
  14. 2.2 16km W of Almanor, CA
  15. 3.0 15km NNE 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.