QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

31km NW of Rancho Tehama Reserve, CA

· 8.3 km deep · released about 390 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 37 kmTrinity County 62 kmGlenn County 72 kmShasta County 79 kmButte County 109 kmMendocino County 110 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 2.7 (md)
Depth
8.3 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Tehama County, 37 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1401 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 390 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 39,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 28,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.5× the energy of this one
  4. This earthquake M 2.7 about 390 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 40.2178, -122.6548. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 37 km (23 mi) WNW of here earthquakes near Tehama County
Trinity County, CA 62 km (38 mi) SE of here earthquakes near Trinity County
Glenn County, CA 72 km (45 mi) NNW of here earthquakes near Glenn County
Shasta County, CA 79 km (49 mi) SW of here earthquakes near Shasta County
Butte County, CA 109 km (68 mi) NW of here earthquakes near Butte County
Mendocino County, CA 110 km (69 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

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

  1. 1.9 4 km E of Redding, CA
  2. 2.3 13 km NNE of Red Bluff, CA
  3. 2.4 14 km NNE of Red Bluff, CA
  4. 2.5 18 km N of Alder Springs, CA
  5. 2.4 18 km WSW of Shasta, CA
  6. 1.5 34 km NE of Covelo, CA
  7. 2.5 40 km NNE of Covelo, CA
  8. 1.8 19 km SW of Shasta, CA
  9. 2.1 19 km SW of Shasta, CA
  10. 2.6 15 km SE of Anderson, CA
  11. 1.8 32 km WNW of Rancho Tehama Reserve, CA
  12. 2.0 38km W of Rancho Tehama Reserve, CA
  13. 1.9 40km W of Rancho Tehama Reserve, CA
  14. 2.3 26km ENE of Covelo, CA
  15. 2.1 26km ENE of Covelo, 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.