QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

13km WNW of Calistoga, CA

· 6.5 km deep · released about 62 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sonoma County 23 kmNapa County 36 kmLake County 53 kmMarin County 65 kmYolo County 70 kmColusa County 73 kmSolano County 78 kmSutter County 97 kmContra Costa County 103 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
6.5 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Sonoma County, 23 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2038 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 62 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 5.8 240,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 170,000× the energy of this one
  3. Around the size people start to feel M 3.0 15× the energy of this one
  4. This earthquake M 2.2 about 62 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 38.6357, -122.7048. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sonoma County, CA 23 km (14 mi) ENE of here earthquakes near Sonoma County
Napa County, CA 36 km (22 mi) WNW of here earthquakes near Napa County
Lake County, CA 53 km (33 mi) S of here earthquakes near Lake County
Marin County, CA 65 km (40 mi) N of here earthquakes near Marin County
Yolo County, CA 70 km (43 mi) W of here earthquakes near Yolo County
Colusa County, CA 73 km (45 mi) SW of here earthquakes near Colusa County

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

Aftershocks so far

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

  1. 2.0 4km SSW of Anderson Springs, CA
  2. 1.9 6km NW of The Geysers, CA
  3. 1.5 4km WNW of The Geysers, CA
  4. 1.7 6km WNW of Cobb, CA
  5. 2.2 6km WNW of Cobb, CA
  6. 1.9 4km SW of Anderson Springs, CA
  7. 1.8 6km WNW of The Geysers, CA
  8. 1.7 5km NW of The Geysers, CA
  9. 1.8 11km ENE of Yountville, CA
  10. 2.8 10km ENE of Yountville, CA
  11. 1.8 4km SSW of Anderson Springs, CA
  12. 2.2 4km SSW of Anderson Springs, CA
  13. 2.2 4km W of Cobb, CA
  14. 2.2 4km W of Cobb, CA
  15. 2.3 9km WNW 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 16,000 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.