QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

14km NNE of Hamilton Branch, CA

· 0.1 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Plumas County 50 kmLassen County 51 kmShasta County 92 kmButte County 94 kmSierra County 102 kmTehama County 104 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 1.5 (md)
Depth
0.1 km below the surface
Felt
no reports yet
Nearest
Plumas County, 50 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2679 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 40.4007, -121.0608. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Plumas County, CA 50 km (31 mi) NNW of here earthquakes near Plumas County
Lassen County, CA 51 km (32 mi) SW of here earthquakes near Lassen County
Shasta County, CA 92 km (57 mi) ESE of here earthquakes near Shasta County
Butte County, CA 94 km (58 mi) NNE of here earthquakes near Butte County
Sierra County, CA 102 km (64 mi) NNW of here earthquakes near Sierra County
Tehama County, CA 104 km (65 mi) ENE of here earthquakes near Tehama County

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

Aftershocks so far

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

  1. 1.8 5km ESE of Taylorsville, CA
  2. 1.8 5km ESE of Taylorsville, CA
  3. 1.6 6 km S of Taylorsville, California
  4. 1.9 4km NNW of Almanor, CA
  5. 2.4 2km ESE of Prattville, CA
  6. 1.7 15km NNW of Chester, CA
  7. 1.8 4km SSE of East Shore, CA
  8. 2.0 11km W of Chester, CA
  9. 2.5 11km W of Chester, CA
  10. 1.9 12km SW of Almanor, CA
  11. 2.1 15km WSW of Chester, CA
  12. 2.2 15km WSW of Chester, CA
  13. 2.0 18km SSE of Mineral, CA
  14. 1.5 2km SW of Canyondam, CA
  15. 2.3 15km NNW of Susanville, 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.