QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

25km WNW of Red Bluff, CA

· 17 km deep · released about 77 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 27 kmTrinity County 68 kmShasta County 70 kmGlenn County 72 kmButte 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 2.3 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Tehama County, 27 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1394 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 77 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 77 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 40.2450, -122.5158. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 27 km (17 mi) WNW of here earthquakes near Tehama County
Trinity County, CA 68 km (42 mi) SE of here earthquakes near Trinity County
Shasta County, CA 70 km (43 mi) SW of here earthquakes near Shasta County
Glenn County, CA 72 km (45 mi) N of here earthquakes near Glenn County
Butte County, CA 101 km (63 mi) NW of here earthquakes near Butte County
Mendocino County, CA 120 km (75 mi) NE of here earthquakes near Mendocino 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. 2.5 41 km ENE of Covelo, CA
  2. 2.7 10 km ESE of Red Bluff, CA
  3. 2.1 13 km SE of Anderson, CA
  4. 1.6 12 km ESE of Millville, CA
  5. 2.0 6 km WNW of Palo Cedro, CA
  6. 1.8 4 km WNW of Shasta Lake, CA
  7. 1.8 10 km WSW of Manton, CA
  8. 1.9 18 km SW of Manton, CA
  9. 1.9 19 km SW of Manton, CA
  10. 2.3 19 km NE of Red Bluff, CA
  11. 1.9 14 km W of Shingletown, CA
  12. 1.6 14 km SSE of Millville, CA
  13. 1.9 3 km S of Shasta Lake, CA
  14. 1.9 25 km WSW of Rancho Tehama Reserve, CA
  15. 1.5 6 km N of Millville, 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.