QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

12 km E of Red Bluff, CA

· 27 km deep · released about 290 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 14 kmShasta County 63 kmGlenn County 71 kmButte County 73 kmTrinity County 99 kmPlumas County 111 kmColusa County 114 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
27 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Tehama County, 14 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 537 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 290 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 51,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 36,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.2× the energy of this one
  4. This earthquake M 2.7 about 290 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 40.1975, -122.1013. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 14 km (8 mi) NE of here earthquakes near Tehama County
Shasta County, CA 63 km (39 mi) S of here earthquakes near Shasta County
Glenn County, CA 71 km (44 mi) NNE of here earthquakes near Glenn County
Butte County, CA 73 km (45 mi) NW of here earthquakes near Butte County
Trinity County, CA 99 km (62 mi) ESE of here earthquakes near Trinity County
Plumas County, CA 111 km (69 mi) WNW of here earthquakes near Plumas County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.3 11 km WSW of Manton, CA
  2. 2.3 11 km WSW of Manton, CA
  3. 1.9 12 km WSW of Manton, CA
  4. 2.9 9 km WSW of Manton, CA
  5. 2.3 11 km WSW of Manton, CA
  6. 2.3 11 km WSW of Manton, CA
  7. 1.9 11 km WSW of Manton, CA
  8. 3.4 9 km W of Manton, CA
  9. 2.0 2 km NNE of Palo Cedro, CA
  10. 1.9 12 km S of Manton, CA
  11. 1.7 11 km WSW of Manton, CA
  12. 1.7 12 km WSW of Manton, CA
  13. 2.2 11 km WSW of Manton, CA
  14. 1.9 12 km WSW of Manton, CA
  15. 2.4 17 km WNW of Rancho Tehama Reserve, 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.