QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

20km E of Red Bluff, CA

· 66 km deep · released about 280 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 21 kmShasta County 62 kmButte County 69 kmGlenn County 75 kmPlumas County 103 kmTrinity County 106 kmColusa County 116 kmYuba County 118 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 2.6 (md)
Depth
66 km below the surface
Felt
no reports yet
Nearest
Tehama County, 21 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3173 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 280 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 53,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 38,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.3× the energy of this one
  4. This earthquake M 2.6 about 280 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 40.2023, -122.0052. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 21 km (13 mi) ENE of here earthquakes near Tehama County
Shasta County, CA 62 km (39 mi) S of here earthquakes near Shasta County
Butte County, CA 69 km (43 mi) NNW of here earthquakes near Butte County
Glenn County, CA 75 km (46 mi) NNE of here earthquakes near Glenn County
Plumas County, CA 103 km (64 mi) WNW of here earthquakes near Plumas County
Trinity County, CA 106 km (66 mi) ESE of here earthquakes near Trinity 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. 1.7 12km WSW of Shingletown, CA
  2. 1.8 1km SW of Palo Cedro, CA
  3. 1.9 2km SSE of Palo Cedro, CA
  4. 1.5 20km WSW of Manton, CA
  5. 1.6 1km SSW of Palo Cedro, CA
  6. 1.6 18km SW of Manton, CA
  7. 1.6 19km SW of Manton, CA
  8. 1.6 17km SE of Anderson, CA
  9. 1.7 11km NNE of Shingletown, CA
  10. 1.6 12km NNE of Shingletown, CA
  11. 1.7 6km ENE of Shingletown, CA
  12. 1.8 4km NNW of Millville, CA
  13. 2.4 14km W of Red Bluff, CA
  14. 2.0 14km NW of Viola, CA
  15. 3.0 19km W of Forest Ranch, 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.