QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

12km SE of Willows, CA

· 18 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Glenn County 31 kmColusa County 33 kmButte County 48 kmSutter County 57 kmYuba County 68 kmLake County 68 kmTehama County 76 kmYolo County 88 kmNapa County 107 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
18 km below the surface
Felt
no reports yet
Nearest
Glenn County, 31 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2419 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 8.7 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 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 39.4553, -122.0923. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Glenn County, CA 31 km (19 mi) ESE of here earthquakes near Glenn County
Colusa County, CA 33 km (21 mi) NNE of here earthquakes near Colusa County
Butte County, CA 48 km (30 mi) WSW of here earthquakes near Butte County
Sutter County, CA 57 km (36 mi) NW of here earthquakes near Sutter County
Yuba County, CA 68 km (42 mi) WNW of here earthquakes near Yuba County
Lake County, CA 68 km (42 mi) NE of here earthquakes near Lake 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. 1.9 14km SSW of Hamilton City, CA
  2. 2.0 10km N of Oroville, CA
  3. 2.4 7km WNW of Willows, CA
  4. 2.3 8km WNW of Willows, CA
  5. 2.7 2km NNW of Chico, CA
  6. 2.8 15km E of Willows, CA
  7. 3.8 15km E of Willows, CA
  8. 1.8 4km SSE of Hamilton City, CA
  9. 2.1 3km W of Chico, CA
  10. 1.8 10km N of Oroville, CA
  11. 2.6 14km SSE of Willows, CA
  12. 1.8 5km SE of Hamilton City, CA
  13. 2.2 16km E of Willows, CA
  14. 3.9 15km E of Willows, CA
  15. 1.9 16km NW of Biggs, 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.