QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

44km SE of Fall River Mills, CA

· -1.0 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lassen County 34 kmShasta County 87 kmPlumas County 89 kmModoc County 94 kmWashoe 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 2.4 (md)
Depth
-1.0 km below the surface
Felt
no reports yet
Nearest
Lassen County, 34 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2399 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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 120,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 86,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.7× the energy of this one
  4. This earthquake M 2.4 about 120 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 40.7808, -121.0160. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lassen County, CA 34 km (21 mi) WNW of here earthquakes near Lassen County
Shasta County, CA 87 km (54 mi) E of here earthquakes near Shasta County
Plumas County, CA 89 km (55 mi) N of here earthquakes near Plumas County
Modoc County, CA 94 km (58 mi) SSW of here earthquakes near Modoc County
Washoe County, NV 114 km (71 mi) W of here earthquakes near Washoe County
Tehama County, CA 126 km (78 mi) NE of here earthquakes near Tehama County

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

Aftershocks so far

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

  1. 1.6 21km SE of Burney, CA
  2. 2.0 24km SSE of Burney, CA
  3. 1.6 22km SE of Burney, CA
  4. 1.6 18km SE of Burney, CA
  5. 2.3 26km SE of Fall River Mills, CA
  6. 1.9 13km ENE of Viola, CA
  7. 1.6 29 km NW of Susanville, California
  8. 2.2 21km NE of Viola, CA
  9. 1.8 36km SE of Fall River Mills, CA
  10. 1.9 23km ESE of McArthur, CA
  11. 2.5 48km NNW of Susanville, CA
  12. 2.0 2km SW of McArthur, CA
  13. 1.6 25km NNE of Hamilton Branch, CA
  14. 1.8 33km NNW of Susanville, CA
  15. 2.0 8km NNW of Chester, 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.