QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

13 km SE of Boonville, CA

· 4.8 km deep · released about 69 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 46 kmSonoma County 55 kmMendocino County 56 kmColusa County 90 kmNapa County 93 kmGlenn County 102 kmMarin County 109 kmYolo County 119 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 2.2 (md)
Depth
4.8 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Lake County, 46 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 536 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 69 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 220,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 150,000× the energy of this one
  3. Around the size people start to feel M 3.0 14× the energy of this one
  4. This earthquake M 2.2 about 69 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 38.9550, -123.2355. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 46 km (28 mi) WSW of here earthquakes near Lake County
Sonoma County, CA 55 km (34 mi) NNW of here earthquakes near Sonoma County
Mendocino County, CA 56 km (35 mi) SSE of here earthquakes near Mendocino County
Colusa County, CA 90 km (56 mi) WSW of here earthquakes near Colusa County
Napa County, CA 93 km (58 mi) WNW of here earthquakes near Napa County
Glenn County, CA 102 km (63 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

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

  1. 1.5 2 km NW of The Geysers, CA
  2. 2.2 8 km ESE of Willits, CA
  3. 1.5 8 km NNW of The Geysers, CA
  4. 2.1 8 km NNW of The Geysers, CA
  5. 1.7 6 km NW of Boonville, CA
  6. 1.7 6 km NW of Boonville, CA
  7. 2.2 6 km NW of Boonville, CA
  8. 1.6 8 km WNW of Cobb, CA
  9. 1.6 7 km NW of The Geysers, CA
  10. 1.5 11 km NW of The Geysers, CA
  11. 1.8 11 km NW of The Geysers, CA
  12. 1.8 10 km NNW of The Geysers, CA
  13. 1.9 5 km NNW of The Geysers, CA
  14. 2.2 10 km ENE of Talmage, CA
  15. 1.7 6 km WNW of Cobb, 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 14,000 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.