QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

12 km W of Mineral, CA

· 8.9 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 50 kmShasta County 58 kmButte County 73 kmPlumas County 82 kmGlenn County 99 kmLassen County 101 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
8.9 km below the surface
Felt
no reports yet
Nearest
Tehama County, 50 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 602 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 14 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 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 40.3147, -121.6973. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 50 km (31 mi) ENE of here earthquakes near Tehama County
Shasta County, CA 58 km (36 mi) SSE of here earthquakes near Shasta County
Butte County, CA 73 km (45 mi) N of here earthquakes near Butte County
Plumas County, CA 82 km (51 mi) WNW of here earthquakes near Plumas County
Glenn County, CA 99 km (62 mi) NE of here earthquakes near Glenn County
Lassen County, CA 101 km (63 mi) WSW of here earthquakes near Lassen 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. 1.9 12 km WSW of Manton, CA
  2. 2.1 21 km SE of Burney, CA
  3. 1.9 9 km W of Manton, CA
  4. 1.6 5 km WNW of Chester, CA
  5. 2.1 11 km WSW of Manton, CA
  6. 2.2 9 km WSW of Manton, CA
  7. 1.6 13 km SW of Mineral, CA
  8. 2.0 11 km W of Shingletown, CA
  9. 1.8 9 km E of Anderson, CA
  10. 2.3 18 km W of Manton, CA
  11. 1.6 2 km NNE of Prattville, CA
  12. 1.9 2 km ENE of Almanor, CA
  13. 1.6 6 km SSE of Millville, CA
  14. 2.4 12 km W of Shingletown, CA
  15. 1.6 19 km ENE of Red Bluff, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2024-04-05 — it released about 9,400 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.