QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

12km SSE of Boonville, CA

· 2.7 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 52 kmSonoma County 54 kmMendocino County 59 kmNapa County 95 kmColusa County 96 kmMarin County 107 kmGlenn County 108 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 1.6 (md)
Depth
2.7 km below the surface
Felt
no reports yet
Nearest
Lake County, 52 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2148 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 38.9160, -123.2908. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 52 km (32 mi) WSW of here earthquakes near Lake County
Sonoma County, CA 54 km (33 mi) NW of here earthquakes near Sonoma County
Mendocino County, CA 59 km (37 mi) SSE of here earthquakes near Mendocino County
Napa County, CA 95 km (59 mi) WNW of here earthquakes near Napa County
Colusa County, CA 96 km (59 mi) WSW of here earthquakes near Colusa County
Marin County, CA 107 km (67 mi) NNW of here earthquakes near Marin County

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

Aftershocks so far

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

  1. 1.9 6km WNW of The Geysers, CA
  2. 2.2 10km SE of Willits, CA
  3. 1.8 3km NNW of The Geysers, CA
  4. 1.5 5km SSW of Boonville, CA
  5. 2.1 5km NW of The Geysers, CA
  6. 2.5 6km ESE of Point Arena, CA
  7. 2.0 7km NW of The Geysers, CA
  8. 1.5 2km WNW of The Geysers, CA
  9. 2.1 1km NW of The Geysers, CA
  10. 2.8 5km WNW of The Geysers, CA
  11. 1.6 1km N of The Geysers, CA
  12. 1.6 5km ESE of Boonville, CA
  13. 1.8 7km W of Cobb, CA
  14. 2.1 9km NW of The Geysers, CA
  15. 1.6 9km 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 130,000 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.