QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8mw

15km E of Willows, CA

· 23 km deep · released about 8.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Glenn County 34 kmButte County 39 kmColusa County 42 kmSutter County 60 kmYuba County 64 kmTehama County 70 kmLake County 77 kmYolo County 94 kmNevada County 110 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 3.8 (mw)
Depth
23 km below the surface
Felt
167 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
Glenn County, 34 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1912 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 167 people have reported feeling it to USGS.

How big was it?

This earthquake released about 8.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 21,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 930× the energy of this one
  3. Magna, Utah 2020 M 5.7 660× the energy of this one
  4. This earthquake M 3.8 about 8.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 17× more

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 39.5165, -122.0170. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Glenn County, CA 34 km (21 mi) ESE of here earthquakes near Glenn County
Butte County, CA 39 km (24 mi) WSW of here earthquakes near Butte County
Colusa County, CA 42 km (26 mi) NNE of here earthquakes near Colusa County
Sutter County, CA 60 km (37 mi) NNW of here earthquakes near Sutter County
Yuba County, CA 64 km (40 mi) WNW of here earthquakes near Yuba County
Tehama County, CA 70 km (44 mi) SSE of here earthquakes near Tehama 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. 2.2 13 km NW of Willows, CA
  2. 2.5 17 km E of Willows, CA
  3. 2.2 5 km W of Hamilton City, CA
  4. 2.0 18 km ESE of Willows, CA
  5. 2.0 18 km ESE of Willows, CA
  6. 2.9 6 km W of Hamilton City, CA
  7. 2.2 7 km ENE of Hamilton City, CA
  8. 2.2 9 km WSW of Williams, CA
  9. 2.4 18 km E of Willows, CA
  10. 2.6 15 km ENE of Willows, CA
  11. 2.1 12km W of Williams, CA
  12. 2.3 13km WSW of Williams, CA
  13. 2.1 18km E of Willows, CA
  14. 2.2 18km E of Willows, CA
  15. 2.1 8km WSW of Durham, 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.