QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6mw

9km SW of Cloverdale, CA

· 6.3 km deep · released about 3.7 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sonoma County 29 kmLake County 50 kmNapa County 72 kmMendocino County 81 kmMarin County 84 kmColusa County 88 kmYolo County 104 kmGlenn County 112 kmSan Francisco County 114 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 3.6 (mw)
Depth
6.3 km below the surface
Felt
126 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Sonoma County, 29 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1256 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 126 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 46,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,500× the energy of this one
  4. This earthquake M 3.6 about 3.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 7.7× 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 38.7512, -123.0948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sonoma County, CA 29 km (18 mi) NNW of here earthquakes near Sonoma County
Lake County, CA 50 km (31 mi) SW of here earthquakes near Lake County
Napa County, CA 72 km (45 mi) WNW of here earthquakes near Napa County
Mendocino County, CA 81 km (51 mi) SSE of here earthquakes near Mendocino County
Marin County, CA 84 km (52 mi) NNW of here earthquakes near Marin County
Colusa County, CA 88 km (55 mi) WSW of here earthquakes near Colusa County

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

Aftershocks so far

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

  1. 1.7 2km NNW of The Geysers, CA
  2. 1.9 6km W of Sea Ranch, CA
  3. 1.8 7km NW of The Geysers, CA
  4. 1.8 7km NW of The Geysers, CA
  5. 2.2 10km WNW of The Geysers, CA
  6. 1.8 10km WNW of The Geysers, CA
  7. 2.3 10km WNW of The Geysers, CA
  8. 1.6 10km WNW of The Geysers, CA
  9. 1.6 10km WNW of The Geysers, CA
  10. 1.5 5km NNW of Boonville, CA
  11. 2.2 1km NW of The Geysers, CA
  12. 1.5 4km NNW of The Geysers, CA
  13. 1.7 0km NW of Anderson Springs, CA
  14. 1.5 2km NW of The Geysers, CA
  15. 2.5 2km 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 130 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.