QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

9 km WNW of Old Station, California

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Shasta County 44 kmLassen County 76 kmTehama County 89 kmPlumas County 100 kmButte County 118 kmModoc County 118 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
5.9 km below the surface
Felt
no reports yet
Nearest
Shasta County, 44 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3518 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

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 6.7 270,000× 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 8,500× 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 1.3× 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 40.7207, -121.5238. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Shasta County, CA 44 km (27 mi) E of here earthquakes near Shasta County
Lassen County, CA 76 km (47 mi) W of here earthquakes near Lassen County
Tehama County, CA 89 km (55 mi) NE of here earthquakes near Tehama County
Plumas County, CA 100 km (62 mi) NW of here earthquakes near Plumas County
Butte County, CA 118 km (73 mi) N of here earthquakes near Butte County
Modoc County, CA 118 km (73 mi) SW of here earthquakes near Modoc 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. 1.9 10 km S of Hat Creek, California
  2. 2.0 9 km S of Hat Creek, California
  3. 2.7 10 km NW of Old Station, California
  4. 2.4 10 km NW of Old Station, California
  5. 2.0 9 km S of Hat Creek, California
  6. 2.6 10 km NW of Old Station, California
  7. 2.4 10 km NW of Old Station, California
  8. 2.3 10 km NW of Old Station, California
  9. 1.7 9 km NW of Old Station, California
  10. 2.0 10 km NW of Old Station, California
  11. 1.6 15 km NNE of Mineral, California
  12. 2.5 9 km S of Hat Creek, California
  13. 2.3 9 km S of Hat Creek, California
  14. 1.9 8 km NW of Old Station, California
  15. 1.8 9 km NW of Old Station, California

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.