QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

10km SSW of Kelseyville, CA

· 3.3 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 27 kmSonoma County 41 kmColusa County 64 kmNapa County 64 kmMendocino County 78 kmYolo County 87 kmGlenn County 89 kmMarin County 94 kmSutter 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 1.5 (md)
Depth
3.3 km below the surface
Felt
no reports yet
Nearest
Lake County, 27 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3184 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 38.8888, -122.8758. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 27 km (17 mi) SSW of here earthquakes near Lake County
Sonoma County, CA 41 km (25 mi) N of here earthquakes near Sonoma County
Colusa County, CA 64 km (40 mi) WSW of here earthquakes near Colusa County
Napa County, CA 64 km (40 mi) NW of here earthquakes near Napa County
Mendocino County, CA 78 km (48 mi) SE of here earthquakes near Mendocino County
Yolo County, CA 87 km (54 mi) WNW of here earthquakes near Yolo 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. 2.3 10km WNW of The Geysers, CA
  2. 1.8 5km WNW of The Geysers, CA
  3. 1.9 2km ENE of The Geysers, CA
  4. 1.9 18km NE of Upper Lake, CA
  5. 2.4 6km NW of The Geysers, CA
  6. 1.9 6km NW of The Geysers, CA
  7. 2.0 4km WNW of Lower Lake, CA
  8. 2.0 4km WNW of Lower Lake, CA
  9. 1.8 4km SSW of Clearlake, CA
  10. 2.6 4km WNW of Lower Lake, CA
  11. 1.9 11km WNW of The Geysers, CA
  12. 2.0 1km NE of The Geysers, CA
  13. 1.6 7km NW of The Geysers, CA
  14. 1.6 1km NNE of The Geysers, CA
  15. 1.8 2km NNE 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 5.1 on 2016-08-10 — it released about 240,000 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.