QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

9 km E of Rancho Tehama Reserve, CA

· 37 km deep · released about 190 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 15 kmGlenn County 45 kmButte County 70 kmShasta County 87 kmColusa County 92 kmTrinity County 100 kmLake County 107 kmYuba County 115 kmMendocino County 117 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 2.5 (md)
Depth
37 km below the surface
Felt
no reports yet
Nearest
Tehama County, 15 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 25 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 190 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 78,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 55,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.9× the energy of this one
  4. This earthquake M 2.5 about 190 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 39.9998, -122.2917. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 15 km (9 mi) SSW of here earthquakes near Tehama County
Glenn County, CA 45 km (28 mi) NNE of here earthquakes near Glenn County
Butte County, CA 70 km (43 mi) WNW of here earthquakes near Butte County
Shasta County, CA 87 km (54 mi) SSW of here earthquakes near Shasta County
Colusa County, CA 92 km (57 mi) N of here earthquakes near Colusa County
Trinity County, CA 100 km (62 mi) SE of here earthquakes near Trinity County

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

Aftershocks so far

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

  1. 2.7 22 km SSW of Manton, CA
  2. 2.7 5 km W of Hamilton City, CA
  3. 1.9 16 km 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.