QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

14km ENE of Hidden Valley Lake, CA

· 17 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Colusa County 38 kmLake County 39 kmNapa County 41 kmYolo County 49 kmSonoma County 59 kmSutter County 64 kmSolano County 78 kmGlenn County 82 kmMarin County 95 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
17 km below the surface
Felt
no reports yet
Nearest
Colusa County, 38 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2435 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 11 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 38.8673, -122.4132. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Colusa County, CA 38 km (23 mi) SSW of here earthquakes near Colusa County
Lake County, CA 39 km (24 mi) SE of here earthquakes near Lake County
Napa County, CA 41 km (25 mi) N of here earthquakes near Napa County
Yolo County, CA 49 km (30 mi) WNW of here earthquakes near Yolo County
Sonoma County, CA 59 km (36 mi) NE of here earthquakes near Sonoma County
Sutter County, CA 64 km (40 mi) WSW of here earthquakes near Sutter 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. 1.5 7km NW of The Geysers, CA
  2. 2.0 7km W of Cobb, CA
  3. 1.5 7km W of Cobb, CA
  4. 3.7 7km W of Cobb, CA
  5. 1.6 7km WSW of Clearlake, CA
  6. 1.8 14km E of Angwin, CA
  7. 1.6 15km E of Angwin, CA
  8. 2.1 2km N of The Geysers, CA
  9. 1.5 7km WNW of Cobb, CA
  10. 1.7 6km WNW of Cobb, CA
  11. 3.7 6km WNW of Cobb, CA
  12. 2.8 6km W of Cobb, CA
  13. 1.5 7km WSW of Clearlake, CA
  14. 2.2 5km NW of The Geysers, CA
  15. 2.1 4km WNW of Cobb, 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 86,000 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.