QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

8km NW of Dunnigan, CA

· 16 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sutter County 30 kmYolo County 31 kmColusa County 32 kmNapa County 55 kmLake County 65 kmYuba County 69 kmSolano County 75 kmSacramento County 80 kmGlenn County 80 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 2.5 (md)
Depth
16 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
Sutter County, 30 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1828 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 83,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 59,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.2× the energy of this one
  4. This earthquake M 2.5 about 180 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 38.9415, -122.0228. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sutter County, CA 30 km (18 mi) WSW of here earthquakes near Sutter County
Yolo County, CA 31 km (19 mi) NNW of here earthquakes near Yolo County
Colusa County, CA 32 km (20 mi) SE of here earthquakes near Colusa County
Napa County, CA 55 km (34 mi) NNE of here earthquakes near Napa County
Lake County, CA 65 km (40 mi) ESE of here earthquakes near Lake County
Yuba County, CA 69 km (43 mi) WSW of here earthquakes near Yuba County

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

Aftershocks so far

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

  1. 1.9 11km ENE of Hidden Valley Lake, CA
  2. 1.6 19km ENE of Clearlake Oaks, CA
  3. 1.7 14km E of Angwin, CA
  4. 1.5 15km E of Angwin, CA
  5. 1.6 13km ESE of Hidden Valley Lake, CA
  6. 2.0 12km ESE of Hidden Valley Lake, CA
  7. 1.9 12km ESE of Hidden Valley Lake, CA
  8. 2.0 12km ESE of Hidden Valley Lake, CA
  9. 1.7 17km E of Angwin, CA
  10. 2.2 15km ENE of Angwin, CA
  11. 1.8 14km NNE of Angwin, CA
  12. 2.0 7km WNW of Davis, CA
  13. 2.0 6km WNW of Davis, CA
  14. 1.9 14km E of Angwin, CA
  15. 1.6 9km ESE of Hidden Valley Lake, 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.