QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6km ESE of Red Bluff, CA

· 26 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 6 kmGlenn County 64 kmShasta County 69 kmButte County 73 kmTrinity County 97 kmColusa County 109 kmPlumas 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 1.8 (md)
Depth
26 km below the surface
Felt
no reports yet
Nearest
Tehama County, 6 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2878 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 15 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 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 40.1528, -122.1768. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 6 km (3 mi) ENE of here earthquakes near Tehama County
Glenn County, CA 64 km (40 mi) NNE of here earthquakes near Glenn County
Shasta County, CA 69 km (43 mi) S of here earthquakes near Shasta County
Butte County, CA 73 km (45 mi) NW of here earthquakes near Butte County
Trinity County, CA 97 km (60 mi) SE of here earthquakes near Trinity County
Colusa County, CA 109 km (67 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

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

  1. 2.0 5km NNE of Hamilton City, CA
  2. 1.5 11km SSW of Manton, CA
  3. 2.2 18km W of Manton, CA
  4. 1.7 12km SSW of Manton, CA
  5. 2.8 4km NE of Hamilton City, CA
  6. 1.8 4km NE of Hamilton City, CA
  7. 2.9 4km NE of Hamilton City, CA
  8. 1.8 18km ESE of Anderson, CA
  9. 1.9 6km N of Chico, CA
  10. 1.6 18km ESE of Anderson, CA
  11. 1.7 16km ESE of Anderson, CA
  12. 2.9 13km SSW of Manton, CA
  13. 1.6 18km SSW of Mineral, CA
  14. 1.6 20km NE of Red Bluff, CA
  15. 1.8 20km NE 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.

On USGS

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