QuakeIndex

Earthquake · automatic estimate, may change

M 2.8md

7 km ESE of Cloverdale, CA

· 6.3 km deep · released about 420 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sonoma County 27 kmLake County 41 kmNapa County 62 kmColusa County 76 kmMarin County 82 kmMendocino County 85 kmYolo County 91 kmGlenn County 104 kmSolano County 104 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 2.8 (md)
Depth
6.3 km below the surface
Felt
9 reports · strongest reported intensity III
Nearest
Sonoma County, 27 km S
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 52 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 9 people have reported feeling it to USGS.

How big was it?

This earthquake released about 420 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 36,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 26,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.3× the energy of this one
  4. This earthquake M 2.8 about 420 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 38.7717, -122.9478. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sonoma County, CA 27 km (17 mi) N of here earthquakes near Sonoma County
Lake County, CA 41 km (26 mi) SSW of here earthquakes near Lake County
Napa County, CA 62 km (38 mi) WNW of here earthquakes near Napa County
Colusa County, CA 76 km (47 mi) SW of here earthquakes near Colusa County
Marin County, CA 82 km (51 mi) NNW of here earthquakes near Marin County
Mendocino County, CA 85 km (53 mi) SSE of here earthquakes near Mendocino 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. 1.6 7 km W of Cobb, CA
  2. 1.5 6 km W of Cobb, CA
  3. 2.0 3 km ESE of The Geysers, CA
  4. 1.5 7 km W of Cobb, CA
  5. 1.5 6 km NW of The Geysers, CA
  6. 1.8 6 km W of Cobb, CA
  7. 1.6 6 km WNW of Cobb, CA
  8. 1.9 8 km ESE of Cloverdale, CA
  9. 2.1 5 km NNW of The Geysers, CA
  10. 1.6 10 km WNW of The Geysers, CA
  11. 1.6 4 km W of Cobb, CA
  12. 1.5 9 km WNW of The Geysers, CA
  13. 1.5 13 km SE of Middletown, CA
  14. 1.6 6 km WNW of Cobb, CA
  15. 1.7 7 km NW of The Geysers, 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 2,400 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.