QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

8km S of Mineral, CA

· 5.0 km deep · released about 720 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 60 kmShasta County 67 kmButte County 69 kmPlumas County 70 kmLassen County 92 kmGlenn County 105 kmYuba County 115 kmSierra 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 2.9 (md)
Depth
5.0 km below the surface
Felt
5 reports · strongest reported intensity III
Nearest
Tehama County, 60 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2945 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 720 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 21,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 15,000× 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 720 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 40.2887, -121.5555. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 60 km (37 mi) ENE of here earthquakes near Tehama County
Shasta County, CA 67 km (41 mi) SE of here earthquakes near Shasta County
Butte County, CA 69 km (43 mi) N of here earthquakes near Butte County
Plumas County, CA 70 km (44 mi) WNW of here earthquakes near Plumas County
Lassen County, CA 92 km (57 mi) WSW of here earthquakes near Lassen County
Glenn County, CA 105 km (65 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

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

  1. 1.7 6km SE of Viola, CA
  2. 1.5 4km WSW of Hamilton Branch, CA
  3. 2.2 2km ENE of Belden, CA
  4. 1.5 2km SW of Canyondam, CA
  5. 1.5 14km NNE of Hamilton Branch, CA
  6. 1.6 1km WSW of Almanor, CA
  7. 1.6 4 km SSW of Canyondam, California
  8. 1.5 20km NE of Red Bluff, CA
  9. 2.6 10km SW of Shingletown, CA
  10. 2.0 6km SSW of Canyondam, CA
  11. 1.6 4km W of Almanor, CA
  12. 2.1 13km WSW of Chester, CA
  13. 1.9 2km WNW of East Shore, CA
  14. 1.9 4km SW of East Shore, CA
  15. 1.5 16km SW of Manton, 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.