QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

9km SSE of Mineral, CA

· -1.5 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 63 kmPlumas County 67 kmButte County 69 kmShasta County 69 kmLassen County 90 kmGlenn County 107 kmYuba County 113 kmSierra County 116 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
-1.5 km below the surface
Felt
no reports yet
Nearest
Tehama County, 63 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2599 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 21 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 5.8 730,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 520,000× the energy of this one
  3. Around the size people start to feel M 3.0 46× the energy of this one
  4. This earthquake M 1.9 about 21 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 40.2817, -121.5193. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 63 km (39 mi) ENE of here earthquakes near Tehama County
Plumas County, CA 67 km (42 mi) WNW of here earthquakes near Plumas County
Butte County, CA 69 km (43 mi) N of here earthquakes near Butte County
Shasta County, CA 69 km (43 mi) SE of here earthquakes near Shasta County
Lassen County, CA 90 km (56 mi) WSW of here earthquakes near Lassen County
Glenn County, CA 107 km (66 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. 1.8 11km NW of Viola, CA
  2. 1.6 4km NNE of Belden, CA
  3. 1.7 5km NE of Canyondam, CA
  4. 1.7 14km SW of Almanor, CA
  5. 1.6 3km SSW of East Shore, CA
  6. 1.5 4km NNW of Almanor, CA
  7. 2.3 4km N of Almanor, CA
  8. 1.8 3km NNE of Prattville, CA
  9. 1.6 15km NNE of Shingletown, CA
  10. 2.1 9km NW of Caribou, CA
  11. 2.0 16km NW of Viola, CA
  12. 1.6 20km NE of Red Bluff, CA
  13. 1.6 20km NE of Red Bluff, CA
  14. 1.8 15km WSW of Chester, CA
  15. 1.5 10km WSW of Chester, 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.