QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

12km SE of Mineral, CA

· 7.6 km deep · released about 750 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 63 kmTehama County 67 kmButte County 68 kmShasta County 73 kmLassen County 87 kmGlenn County 109 kmSierra County 112 kmYuba County 112 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 2.9 (md)
Depth
7.6 km below the surface
Felt
3 reports · strongest reported intensity II
Nearest
Plumas County, 63 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1667 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 750 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 20,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 14,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.3× the energy of this one
  4. This earthquake M 2.9 about 750 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 40.2730, -121.4720. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 63 km (39 mi) WNW of here earthquakes near Plumas County
Tehama County, CA 67 km (41 mi) ENE of here earthquakes near Tehama County
Butte County, CA 68 km (43 mi) N of here earthquakes near Butte County
Shasta County, CA 73 km (45 mi) SE of here earthquakes near Shasta County
Lassen County, CA 87 km (54 mi) SW of here earthquakes near Lassen County
Glenn County, CA 109 km (68 mi) NE of here earthquakes near Glenn County

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

Aftershocks so far

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

  1. 1.5 12km ESE of Viola, CA
  2. 2.5 11km N of Mineral, CA
  3. 1.6 14km NNW of Chester, CA
  4. 1.6 4km N of Canyondam, CA
  5. 1.6 11km S of Manton, CA
  6. 1.7 11km WNW of Chester, CA
  7. 1.9 17km S of Mineral, CA
  8. 2.1 10km WNW of Chester, CA
  9. 1.7 4km N of Viola, CA
  10. 1.9 14km NNE of Mineral, CA
  11. 1.6 2km ESE of Chester, CA
  12. 1.7 5km WNW of Hamilton Branch, CA
  13. 2.0 24km SSE of Burney, CA
  14. 1.5 5km N of Almanor, CA
  15. 1.6 8km SSE of Mineral, 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.