QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

8km WNW of Caribou, CA

· 2.2 km deep · released about 24 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 38 kmButte County 58 kmTehama County 84 kmSierra County 85 kmLassen County 86 kmYuba County 93 kmNevada County 98 kmShasta County 100 kmGlenn County 114 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 1.9 (md)
Depth
2.2 km below the surface
Felt
no reports yet
Nearest
Plumas County, 38 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2101 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 24 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 640,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 450,000× the energy of this one
  3. Around the size people start to feel M 3.0 40× the energy of this one
  4. This earthquake M 1.9 about 24 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 40.1037, -121.2430. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 38 km (23 mi) WNW of here earthquakes near Plumas County
Butte County, CA 58 km (36 mi) NNE of here earthquakes near Butte County
Tehama County, CA 84 km (52 mi) E of here earthquakes near Tehama County
Sierra County, CA 85 km (53 mi) NW of here earthquakes near Sierra County
Lassen County, CA 86 km (53 mi) SW of here earthquakes near Lassen County
Yuba County, CA 93 km (58 mi) N of here earthquakes near Yuba 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. 1.6 15km SSW of Mineral, CA
  2. 1.6 15km SSW of Mineral, CA
  3. 1.6 10km NNE of Mineral, CA
  4. 1.6 11km NNE of Mineral, CA
  5. 1.7 11km NNE of Mineral, CA
  6. 1.5 10km NNE of Mineral, CA
  7. 1.9 10km NNE of Mineral, CA
  8. 1.9 11km NNE of Mineral, CA
  9. 2.1 7km N of Greenhorn, CA
  10. 1.6 14km NE of Mineral, CA
  11. 1.5 11km SW of Chester, CA
  12. 1.9 4km NNE of Prattville, CA
  13. 1.8 5km SSE of Mineral, CA
  14. 1.7 4km SSE of Mineral, CA
  15. 1.5 6 km SSE of Quincy, California

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.