QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

4km N of Hamilton City, CA

· 16 km deep · released about 530 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Butte County 37 kmGlenn County 38 kmTehama County 43 kmColusa County 69 kmYuba County 80 kmSutter County 87 kmLake County 97 kmPlumas County 104 kmShasta County 109 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 2.8 (md)
Depth
16 km below the surface
Felt
5 reports · strongest reported intensity III
Nearest
Butte County, 37 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2262 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 530 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 29,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 20,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.8× the energy of this one
  4. This earthquake M 2.8 about 530 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 39.7765, -122.0145. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Butte County, CA 37 km (23 mi) WNW of here earthquakes near Butte County
Glenn County, CA 38 km (24 mi) ENE of here earthquakes near Glenn County
Tehama County, CA 43 km (27 mi) SSE of here earthquakes near Tehama County
Colusa County, CA 69 km (43 mi) NNE of here earthquakes near Colusa County
Yuba County, CA 80 km (50 mi) NW of here earthquakes near Yuba County
Sutter County, CA 87 km (54 mi) NNW of here earthquakes near Sutter County

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

Aftershocks so far

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

  1. 2.3 16km E of Willows, CA
  2. 2.1 6km N of Hamilton City, CA
  3. 1.8 15km ENE of Willows, CA
  4. 1.8 5km W of Paradise, CA
  5. 1.6 9km N of Biggs, CA
  6. 2.2 15km E of Willows, CA
  7. 1.8 15km SSW of Hamilton City, CA
  8. 1.9 14km SSW of Hamilton City, CA
  9. 2.0 10km N of Oroville, CA
  10. 2.4 7km WNW of Willows, CA
  11. 2.3 8km WNW of Willows, CA
  12. 2.7 2km NNW of Chico, CA
  13. 2.8 15km E of Willows, CA
  14. 3.8 15km E of Willows, CA
  15. 1.7 30km NNW of Forest Ranch, 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.