QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6km NNE of Gerber, CA

· 32 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 9 kmGlenn County 61 kmButte County 66 kmShasta County 73 kmTrinity County 103 kmColusa County 104 kmPlumas County 112 kmYuba County 115 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
32 km below the surface
Felt
no reports yet
Nearest
Tehama County, 9 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2392 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 16 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 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 40.1068, -122.1267. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 9 km (6 mi) ESE of here earthquakes near Tehama County
Glenn County, CA 61 km (38 mi) NNE of here earthquakes near Glenn County
Butte County, CA 66 km (41 mi) NW of here earthquakes near Butte County
Shasta County, CA 73 km (45 mi) S of here earthquakes near Shasta County
Trinity County, CA 103 km (64 mi) SE of here earthquakes near Trinity County
Colusa County, CA 104 km (64 mi) N of here earthquakes near Colusa 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. 2.5 5km NNE of Hamilton City, CA
  2. 1.8 4km NNE of Hamilton City, CA
  3. 1.6 15km SSW of Mineral, CA
  4. 1.6 15km SSW of Mineral, CA
  5. 2.1 6km N of Hamilton City, CA
  6. 2.0 18km ESE of Anderson, CA
  7. 1.9 20km NE of Red Bluff, CA
  8. 1.9 13km W of Shingletown, CA
  9. 2.7 2km NNW of Chico, CA
  10. 2.2 19km WSW of Manton, CA
  11. 1.8 9km ESE of Millville, CA
  12. 1.9 21km SE of Anderson, CA
  13. 1.7 30km NNW of Forest Ranch, CA
  14. 1.8 4km SSE of Hamilton City, CA
  15. 1.5 12km W of Shingletown, 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.