QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

15km ENE of Willows, CA

· 19 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Glenn County 33 kmButte County 38 kmColusa County 46 kmSutter County 64 kmTehama County 66 kmYuba County 66 kmLake County 80 kmYolo County 98 kmNevada County 111 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 1.8 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Glenn County, 33 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1902 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 39.5578, -122.0188. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Glenn County, CA 33 km (21 mi) E of here earthquakes near Glenn County
Butte County, CA 38 km (23 mi) WSW of here earthquakes near Butte County
Colusa County, CA 46 km (29 mi) NNE of here earthquakes near Colusa County
Sutter County, CA 64 km (40 mi) NNW of here earthquakes near Sutter County
Tehama County, CA 66 km (41 mi) SSE of here earthquakes near Tehama County
Yuba County, CA 66 km (41 mi) WNW of here earthquakes near Yuba County

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

Aftershocks so far

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

  1. 2.7 14 km E of Willows, CA
  2. 2.1 15 km ESE of Willows, CA
  3. 2.2 5 km ESE of Hamilton City, CA
  4. 2.7 7 km NNE of Hamilton City, CA
  5. 2.4 6 km NNE of Hamilton City, CA
  6. 2.2 6 km NNE of Hamilton City, CA
  7. 3.1 14 km NNE of Maxwell, CA
  8. 2.3 14 km NNE of Maxwell, CA
  9. 2.1 17 km ESE of Willows, CA
  10. 2.1 6 km W of Magalia, CA
  11. 2.3 7 km WNW of Hamilton City, CA
  12. 2.5 8 km E of Orland, CA
  13. 2.7 17 km ESE of Willows, CA
  14. 2.5 17 km ESE of Willows, CA
  15. 2.2 13 km NW of Willows, 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.