QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

25km NNE of Hamilton Branch, CA

· 2.0 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lassen County 39 kmPlumas County 56 kmShasta County 96 kmButte County 105 kmSierra County 108 kmWashoe County 114 kmTehama 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 1.6 (md)
Depth
2.0 km below the surface
Felt
no reports yet
Nearest
Lassen County, 39 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1963 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 40.4807, -120.9715. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lassen County, CA 39 km (25 mi) SW of here earthquakes near Lassen County
Plumas County, CA 56 km (35 mi) NNW of here earthquakes near Plumas County
Shasta County, CA 96 km (59 mi) ESE of here earthquakes near Shasta County
Butte County, CA 105 km (65 mi) NNE of here earthquakes near Butte County
Sierra County, CA 108 km (67 mi) NNW of here earthquakes near Sierra County
Washoe County, NV 114 km (71 mi) WSW of here earthquakes near Washoe County

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

Aftershocks so far

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

  1. 1.6 15km E of Viola, CA
  2. 2.5 10km WNW of Chester, CA
  3. 2.4 11km WNW of Chester, CA
  4. 2.0 5km NE of Hamilton Branch, CA
  5. 2.1 3km SW of East Shore, CA
  6. 1.6 9km WSW of Almanor, CA
  7. 1.6 14km NNE of Mineral, CA
  8. 1.8 14km W of Almanor, CA
  9. 2.3 26km SE of Fall River Mills, CA
  10. 1.5 4km NNE of Prattville, CA
  11. 1.6 4km ESE of Chester, CA
  12. 2.0 3km S of Canyondam, CA
  13. 1.7 2 km SW of Canyondam, California
  14. 2.1 4km NNW of Canyondam, CA
  15. 1.8 5km E 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.