QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

8 km SSW of Comptche, California

· 6.6 km deep · released about 52 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 31 kmLake County 76 kmSonoma County 96 kmGlenn County 114 kmColusa 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
6.6 km below the surface
Felt
no reports yet
Nearest
Mendocino County, 31 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3250 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 52 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 5.8 290,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 52 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 39.1918, -123.6230. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 31 km (19 mi) SSW of here earthquakes near Mendocino County
Lake County, CA 76 km (47 mi) W of here earthquakes near Lake County
Sonoma County, CA 96 km (59 mi) NW of here earthquakes near Sonoma County
Glenn County, CA 114 km (71 mi) WSW of here earthquakes near Glenn County
Colusa County, CA 119 km (74 mi) W of here earthquakes near Colusa County
Napa County, CA 136 km (84 mi) NW of here earthquakes near Napa County

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

Aftershocks so far

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

  1. 1.6 2km N of Talmage, CA
  2. 1.7 8km W of Redwood Valley, CA
  3. 1.6 13km N of Brooktrails, CA
  4. 2.2 12km SSE of Talmage, CA
  5. 1.8 11km NNE of Redwood Valley, CA
  6. 1.8 18km WNW of Brooktrails, CA
  7. 1.5 13km WSW of Laytonville, CA
  8. 2.4 7km ESE of Point Arena, CA
  9. 1.5 15km SSW of Willits, CA
  10. 2.1 3km WSW of Navarro Head, CA
  11. 1.8 4km SE of Boonville, CA
  12. 2.1 3km SE of Redwood Valley, CA
  13. 1.6 2km SE of Redwood Valley, CA
  14. 2.2 15km SE of Boonville, CA
  15. 1.7 15km SSW of Willits, 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.