QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

8km W of Boonville, CA

· -0.0 km deep · released about 140 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 48 kmLake County 62 kmSonoma County 70 kmColusa County 107 kmGlenn County 112 kmNapa County 113 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
-0.0 km below the surface
Felt
no reports yet
Nearest
Mendocino County, 48 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2803 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 140 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 5.8 110,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 75,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.7× the energy of this one
  4. This earthquake M 2.5 about 140 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 39.0048, -123.4558. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 48 km (30 mi) S of here earthquakes near Mendocino County
Lake County, CA 62 km (39 mi) W of here earthquakes near Lake County
Sonoma County, CA 70 km (44 mi) NW of here earthquakes near Sonoma County
Colusa County, CA 107 km (66 mi) W of here earthquakes near Colusa County
Glenn County, CA 112 km (70 mi) SW of here earthquakes near Glenn County
Napa County, CA 113 km (70 mi) WNW of here earthquakes near Napa County

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

Aftershocks so far

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

  1. 1.7 10km NNW of Redwood Valley, CA
  2. 2.7 10km NNW of Redwood Valley, CA
  3. 1.9 10km NNW of Redwood Valley, CA
  4. 2.2 10km NNW of Redwood Valley, CA
  5. 1.8 11km NNW of Redwood Valley, CA
  6. 1.9 11km NNW of Redwood Valley, CA
  7. 1.8 10km N of Redwood Valley, CA
  8. 1.9 10km NNW of Redwood Valley, CA
  9. 1.8 9km ESE of Willits, CA
  10. 1.9 11km NNW of Redwood Valley, CA
  11. 2.0 11km NNW of Redwood Valley, CA
  12. 1.8 11km N of Redwood Valley, CA
  13. 1.7 12km WSW of Kelseyville, CA
  14. 1.8 10km NNW of Redwood Valley, CA
  15. 1.7 11km NNW of Redwood Valley, 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.