QuakeIndex

Earthquake · automatic estimate, may change

M 3.2ml

6 km NW of The Geysers, CA

· 2.8 km deep · released about 1,900 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 33 kmSonoma County 34 kmNapa County 54 kmColusa County 64 kmYolo County 80 kmMarin County 85 kmMendocino County 88 kmGlenn County 94 kmSolano County 97 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 3.2 (ml)
Depth
2.8 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
Lake County, 33 km N
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 39 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 180,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,600× the energy of this one
  4. This earthquake M 3.2 about 1,900 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2× more

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 38.8138, -122.8063. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 33 km (21 mi) S of here earthquakes near Lake County
Sonoma County, CA 34 km (21 mi) NNE of here earthquakes near Sonoma County
Napa County, CA 54 km (33 mi) NW of here earthquakes near Napa County
Colusa County, CA 64 km (40 mi) SW of here earthquakes near Colusa County
Yolo County, CA 80 km (50 mi) W of here earthquakes near Yolo County
Marin County, CA 85 km (53 mi) N of here earthquakes near Marin County

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

Aftershocks so far

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

  1. 1.6 8 km ESE of Cloverdale, CA
  2. 1.6 7 km WNW of Cobb, CA
  3. 1.5 11 km ENE of Hidden Valley Lake, CA
  4. 1.9 4 km SSE of Cloverdale, CA
  5. 2.4 2 km N of Middletown, CA
  6. 1.5 2 km NNW of The Geysers, CA
  7. 1.9 8 km SE of Soda Bay, CA
  8. 2.1 6 km NW of The Geysers, CA
  9. 1.7 7 km ESE of Cloverdale, CA
  10. 1.8 6 km ESE of Santa Rosa, CA
  11. 1.8 6 km NW of The Geysers, CA
  12. 1.6 14 km ESE of Hidden Valley Lake, CA
  13. 1.5 6 km NNW of The Geysers, CA
  14. 2.2 2 km NE of The Geysers, CA
  15. 1.8 1 km NE 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 520 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.