QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

2km NE of Prattville, CA

· 5.0 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 37 kmLassen County 71 kmButte County 73 kmSierra County 89 kmTehama County 93 kmShasta County 97 kmYuba County 107 kmNevada County 108 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 3.1 (ml)
Depth
5.0 km below the surface
Felt
86 reports · strongest reported intensity IV
Nearest
Plumas County, 37 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1910 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 86 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 260,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,200× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 40.2212, -121.1438. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 37 km (23 mi) NW of here earthquakes near Plumas County
Lassen County, CA 71 km (44 mi) SW of here earthquakes near Lassen County
Butte County, CA 73 km (45 mi) NNE of here earthquakes near Butte County
Sierra County, CA 89 km (55 mi) NW of here earthquakes near Sierra County
Tehama County, CA 93 km (58 mi) E of here earthquakes near Tehama County
Shasta County, CA 97 km (60 mi) SE of here earthquakes near Shasta 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. 2.2 14km NNE of Mineral, CA
  2. 1.8 14km NNE of Mineral, CA
  3. 1.7 2 km ENE of East Quincy, California
  4. 1.5 11km SW of Chester, CA
  5. 2.6 4km NNE of Almanor, CA
  6. 1.5 6km NNE of Almanor, CA
  7. 2.0 8km NNW of Chester, CA
  8. 1.5 7km ENE of Mineral, CA
  9. 1.6 3km S of Canyondam, CA
  10. 1.7 12km SE of Mineral, CA
  11. 2.0 6km N of Greenhorn, CA
  12. 1.8 3km N of Spring Garden, CA
  13. 1.8 9km W of Susanville, CA
  14. 1.9 8km NW of Chester, CA
  15. 2.2 9km NW 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.