QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

14km NE of Mineral, CA

· -1.3 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 59 kmTehama County 74 kmPlumas County 76 kmLassen County 77 kmButte County 89 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 1.8 (md)
Depth
-1.3 km below the surface
Felt
no reports yet
Nearest
Shasta County, 59 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1249 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 810,000× the energy of this one
  3. Around the size people start to feel M 3.0 72× the energy of this one
  4. This earthquake M 1.8 about 13 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 40.4592, -121.4717. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 59 km (37 mi) SE of here earthquakes near Shasta County
Tehama County, CA 74 km (46 mi) ENE of here earthquakes near Tehama County
Plumas County, CA 76 km (47 mi) NW of here earthquakes near Plumas County
Lassen County, CA 77 km (48 mi) WSW of here earthquakes near Lassen County
Butte County, CA 89 km (55 mi) N of here earthquakes near Butte County
Glenn County, CA 124 km (77 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

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

  1. 2.3 4km NNW of Canyondam, CA
  2. 2.2 4km N of Almanor, CA
  3. 2.2 2km ESE of Prattville, CA
  4. 2.4 2km NE of Prattville, CA
  5. 2.9 4km SE of Prattville, CA
  6. 2.3 4km ESE of Prattville, CA
  7. 2.3 2km N of Prattville, CA
  8. 2.9 4km NW of Canyondam, CA
  9. 2.3 2km ESE of Prattville, CA
  10. 2.0 3km NNE of Almanor, CA
  11. 2.9 1km N of Prattville, CA
  12. 2.4 4km NW of Canyondam, CA
  13. 3.1 3km NNW of Canyondam, CA
  14. 2.8 4km ESE of Prattville, CA
  15. 2.3 6km N of Caribou, 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.