QuakeIndex

Earthquake · reviewed by a seismologist

M 3.4ml

15 km NNE of Red Bluff, CA

· 24 km deep · released about 1.7 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 20 kmShasta County 52 kmGlenn County 80 kmButte County 86 kmTrinity County 88 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 3.4 (ml)
Depth
24 km below the surface
Felt
9 reports · strongest reported intensity III
Nearest
Tehama County, 20 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 186 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 9 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 100,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,200× the energy of this one
  4. This earthquake M 3.4 about 1.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.5× more

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 40.3038, -122.1823. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 20 km (13 mi) NNE of here earthquakes near Tehama County
Shasta County, CA 52 km (32 mi) SSW of here earthquakes near Shasta County
Glenn County, CA 80 km (50 mi) NNE of here earthquakes near Glenn County
Butte County, CA 86 km (54 mi) NW of here earthquakes near Butte County
Trinity County, CA 88 km (54 mi) ESE of here earthquakes near Trinity County
Plumas County, CA 121 km (75 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

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

  1. 2.0 11 km W of Shingletown, CA
  2. 1.8 9 km E of Anderson, CA
  3. 2.3 18 km W of Manton, CA
  4. 1.5 4 km WNW of Shasta Lake, CA
  5. 2.1 6 km E of Shasta, CA
  6. 1.8 8 km NE of Shasta Lake, CA
  7. 1.6 6 km SSE of Millville, CA
  8. 1.7 8 km NE of Shasta Lake, CA
  9. 2.4 12 km W of Shingletown, CA
  10. 1.8 6 km NNE of Shasta Lake, CA
  11. 1.6 19 km ENE of Red Bluff, CA
  12. 1.7 8 km NE of Shasta Lake, CA
  13. 1.6 6 km NNW of Redding, CA
  14. 1.9 2 km WNW of Shasta Lake, CA
  15. 2.7 6 km E of Shasta, 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.