QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

34 km WNW of Rancho Tehama Reserve, California

· 14 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 45 kmTrinity County 63 kmGlenn County 68 kmShasta County 91 kmMendocino County 99 kmButte County 112 kmLake County 116 kmHumboldt County 116 kmColusa 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 1.5 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Tehama County, 45 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3231 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 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 40.1482, -122.7620. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 45 km (28 mi) W of here earthquakes near Tehama County
Trinity County, CA 63 km (39 mi) SSE of here earthquakes near Trinity County
Glenn County, CA 68 km (42 mi) NNW of here earthquakes near Glenn County
Shasta County, CA 91 km (57 mi) SW of here earthquakes near Shasta County
Mendocino County, CA 99 km (61 mi) NE of here earthquakes near Mendocino County
Butte County, CA 112 km (70 mi) WNW of here earthquakes near Butte County

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

Aftershocks so far

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

  1. 2.4 14km W of Red Bluff, CA
  2. 2.0 37km NNE of Covelo, CA
  3. 2.2 40km NE of Covelo, CA
  4. 1.8 28km NNW of Alder Springs, CA
  5. 1.6 20km N of Covelo, CA
  6. 1.9 35km WNW of Rancho Tehama Reserve, CA
  7. 1.6 28km WSW of Rancho Tehama Reserve, CA
  8. 1.7 42km NW of Rancho Tehama Reserve, CA
  9. 2.3 15km NW of Alder Springs, CA
  10. 2.9 14km NW of Alder Springs, CA
  11. 1.7 40km NE of Covelo, CA
  12. 2.4 41km NE of Covelo, CA
  13. 2.0 8km NE of Covelo, CA
  14. 1.8 39km NE of Covelo, CA
  15. 1.8 32km NNW of Alder Springs, 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.