QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

20km S of Mineral, CA

· 8.9 km deep · released about 7.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Butte County 57 kmTehama County 58 kmPlumas County 65 kmShasta County 77 kmGlenn County 97 kmLassen County 99 kmYuba County 102 kmSierra County 110 kmNevada 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 1.6 (md)
Depth
8.9 km below the surface
Felt
no reports yet
Nearest
Butte County, 57 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2949 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 7.8 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 1,900,000× 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 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 7.8 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 40.1750, -121.5480. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Butte County, CA 57 km (35 mi) N of here earthquakes near Butte County
Tehama County, CA 58 km (36 mi) E of here earthquakes near Tehama County
Plumas County, CA 65 km (40 mi) WNW of here earthquakes near Plumas County
Shasta County, CA 77 km (48 mi) SSE of here earthquakes near Shasta County
Glenn County, CA 97 km (60 mi) NE of here earthquakes near Glenn County
Lassen County, CA 99 km (61 mi) SW of here earthquakes near Lassen County

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

Aftershocks so far

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

  1. 1.5 4km WSW of Hamilton Branch, CA
  2. 2.2 2km ENE of Belden, CA
  3. 1.5 2km SW of Canyondam, CA
  4. 1.5 14km NNE of Hamilton Branch, CA
  5. 1.6 1km WSW of Almanor, CA
  6. 1.6 4 km SSW of Canyondam, California
  7. 1.5 20km NE of Red Bluff, CA
  8. 2.6 10km SW of Shingletown, CA
  9. 2.0 6km SSW of Canyondam, CA
  10. 1.6 4km W of Almanor, CA
  11. 2.1 13km WSW of Chester, CA
  12. 1.9 2km WNW of East Shore, CA
  13. 1.9 4km SW of East Shore, CA
  14. 1.5 16km SW of Manton, CA
  15. 2.2 15km SW of Manton, 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.