QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

16km SE of Boonville, CA

· 0.7 km deep · released about 650 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 45 kmSonoma County 51 kmMendocino County 60 kmColusa County 89 kmNapa County 90 kmGlenn County 102 kmMarin County 106 kmYolo County 117 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 2.9 (ml)
Depth
0.7 km below the surface
Felt
17 reports · strongest reported intensity IV
Nearest
Lake County, 45 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2656 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 17 people have reported feeling it to USGS.

How big was it?

This earthquake released about 650 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 23,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 650 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 38.9278, -123.2108. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 45 km (28 mi) WSW of here earthquakes near Lake County
Sonoma County, CA 51 km (32 mi) NNW of here earthquakes near Sonoma County
Mendocino County, CA 60 km (37 mi) SSE of here earthquakes near Mendocino County
Colusa County, CA 89 km (55 mi) WSW of here earthquakes near Colusa County
Napa County, CA 90 km (56 mi) WNW of here earthquakes near Napa County
Glenn County, CA 102 km (64 mi) SW of here earthquakes near Glenn 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. 1.7 2km E of The Geysers, CA
  2. 2.0 7km NW of The Geysers, CA
  3. 1.5 4km NW of The Geysers, CA
  4. 1.7 4km SW of Anderson Springs, CA
  5. 2.0 1km N of The Geysers, CA
  6. 1.6 2km SE of The Geysers, CA
  7. 1.6 3km ENE of The Geysers, CA
  8. 1.7 6km NW of The Geysers, CA
  9. 1.8 6km NW of The Geysers, CA
  10. 1.6 10km WNW of The Geysers, CA
  11. 1.6 8km WNW of Cobb, CA
  12. 1.6 8km WNW of Cobb, CA
  13. 1.7 8km WNW of Cobb, CA
  14. 1.8 8km WNW of Cobb, CA
  15. 1.8 10km 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.0 on 2016-12-14 — it released about 1,500 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.