QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

12km ENE of Clearlake, CA

· 12 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 23 kmColusa County 30 kmNapa County 58 kmYolo County 64 kmSonoma County 65 kmGlenn County 67 kmSutter County 69 kmMendocino County 94 kmSolano County 96 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 1.7 (md)
Depth
12 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Lake County, 23 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2880 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 39.0073, -122.5063. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 23 km (15 mi) ESE of here earthquakes near Lake County
Colusa County, CA 30 km (19 mi) SW of here earthquakes near Colusa County
Napa County, CA 58 km (36 mi) NNW of here earthquakes near Napa County
Yolo County, CA 64 km (40 mi) NW of here earthquakes near Yolo County
Sonoma County, CA 65 km (40 mi) NE of here earthquakes near Sonoma County
Glenn County, CA 67 km (42 mi) S of here earthquakes near Glenn 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. 1.6 3km WSW of Anderson Springs, CA
  2. 2.0 3km NNW of The Geysers, CA
  3. 1.9 3km NNW of The Geysers, CA
  4. 2.8 2km ESE of The Geysers, CA
  5. 1.7 1km NNE of The Geysers, CA
  6. 1.6 2km N of The Geysers, CA
  7. 1.9 6km NW of The Geysers, CA
  8. 2.4 5km WNW of Cobb, CA
  9. 1.9 4km W of Cobb, CA
  10. 2.2 1km NNW of The Geysers, CA
  11. 1.7 7km NW of The Geysers, CA
  12. 1.7 6km WNW of Cobb, CA
  13. 1.9 4km NW of The Geysers, CA
  14. 1.6 3km SW of Cobb, CA
  15. 1.7 3km SE 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 140,000 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.