QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

12km ENE of Mineral, CA

· 9.5 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 64 kmPlumas County 70 kmTehama County 74 kmLassen County 77 kmButte County 84 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
9.5 km below the surface
Felt
no reports yet
Nearest
Shasta County, 64 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2168 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 20 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 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 40.4067, -121.4425. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 64 km (40 mi) SE of here earthquakes near Shasta County
Plumas County, CA 70 km (43 mi) NW of here earthquakes near Plumas County
Tehama County, CA 74 km (46 mi) ENE of here earthquakes near Tehama County
Lassen County, CA 77 km (48 mi) WSW of here earthquakes near Lassen County
Butte County, CA 84 km (52 mi) N of here earthquakes near Butte County
Sierra County, CA 121 km (75 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

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

  1. 1.5 14km N of Shingletown, CA
  2. 1.5 14km WSW of Almanor, CA
  3. 1.6 13km SW of Almanor, CA
  4. 1.5 1km WSW of Canyondam, CA
  5. 2.1 4km SSW of East Shore, CA
  6. 2.3 2km N of Canyondam, CA
  7. 1.6 3km ENE of Prattville, CA
  8. 1.7 4km NNE of Canyondam, CA
  9. 1.6 25km NNE of Hamilton Branch, CA
  10. 1.7 2km NE of Chester, CA
  11. 1.8 18km WSW of Almanor, CA
  12. 2.0 10km WNW of Viola, CA
  13. 1.8 14km NNW of Viola, CA
  14. 2.3 9km ENE of Viola, CA
  15. 2.2 3km ENE of Canyondam, 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.