QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

26 km WSW of Rancho Tehama Reserve, CA

· 5.8 km deep · released about 860 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Glenn County 41 kmTehama County 45 kmMendocino County 84 kmLake County 89 kmColusa County 89 kmTrinity County 90 kmButte County 96 kmShasta County 109 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 3.0 (md)
Depth
5.8 km below the surface
Felt
4 reports · strongest reported intensity II
Nearest
Glenn County, 41 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 782 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 860 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 390,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 18,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 860 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 39.9077, -122.6770. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Glenn County, CA 41 km (26 mi) NW of here earthquakes near Glenn County
Tehama County, CA 45 km (28 mi) WSW of here earthquakes near Tehama County
Mendocino County, CA 84 km (52 mi) NE of here earthquakes near Mendocino County
Lake County, CA 89 km (55 mi) N of here earthquakes near Lake County
Colusa County, CA 89 km (56 mi) NNW of here earthquakes near Colusa County
Trinity County, CA 90 km (56 mi) SSE of here earthquakes near Trinity County

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

Aftershocks so far

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

  1. 1.9 33 km ENE of Covelo, CA
  2. 2.9 21 km NW of Alder Springs, CA
  3. 2.5 20 km NW of Alder Springs, CA
  4. 2.0 21 km NW of Alder Springs, CA
  5. 2.1 21 km NW of Alder Springs, CA
  6. 1.7 7 km E of Covelo, CA
  7. 2.1 23 km NW of Alder Springs, CA
  8. 1.9 26 km N of Alder Springs, CA
  9. 2.3 37 km NNE of Covelo, CA
  10. 1.7 25 km NW of Alder Springs, CA
  11. 1.6 25 km E of Covelo, CA
  12. 2.3 25 km N of Alder Springs, CA
  13. 2.1 23 km NNE of Alder Springs, CA
  14. 2.1 14 km SSE of Covelo, CA
  15. 2.2 14 km SSE 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.