QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

48km NNW of Susanville, CA

· 14 km deep · released about 160 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lassen County 24 kmModoc County 88 kmPlumas County 91 kmShasta County 98 kmWashoe County 103 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 2.5 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Lassen County, 24 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1843 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 160 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 95,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 68,000× the energy of this one
  3. Around the size people start to feel M 3.0 6× the energy of this one
  4. This earthquake M 2.5 about 160 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 40.8138, -120.8762. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lassen County, CA 24 km (15 mi) WNW of here earthquakes near Lassen County
Modoc County, CA 88 km (54 mi) S of here earthquakes near Modoc County
Plumas County, CA 91 km (57 mi) N of here earthquakes near Plumas County
Shasta County, CA 98 km (61 mi) E of here earthquakes near Shasta County
Washoe County, NV 103 km (64 mi) W of here earthquakes near Washoe County
Tehama County, CA 138 km (86 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

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

  1. 1.9 10 km NNE of Susanville, CA
  2. 2.7 10 km NNE of Susanville, CA
  3. 1.6 35 km SSE of Fall River Mills, CA
  4. 1.7 28 km E of Viola, CA
  5. 2.0 38 km SSE of Fall River Mills, CA
  6. 1.6 40 km SSE of Fall River Mills, CA
  7. 1.9 26 km SE of Fall River Mills, CA
  8. 1.9 25 km S of Nubieber, California
  9. 2.2 26 km ESE of Fall River Mills, CA
  10. 2.1 8 km SE of McArthur, CA
  11. 1.6 22 km NNE of Chester, CA
  12. 1.8 37 km N of Chester, CA
  13. 2.0 37km SE of Fall River Mills, CA
  14. 2.4 47km NNW of Susanville, CA
  15. 2.3 26km SE of Fall River Mills, 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.