QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

15 km ENE of Clearlake, CA

· -0.5 km deep · released about 5.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 27 kmColusa County 28 kmNapa County 56 kmYolo County 60 kmSutter County 66 kmSonoma County 66 kmGlenn County 68 kmSolano County 93 kmMendocino County 97 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
-0.5 km below the surface
Felt
no reports yet
Nearest
Lake County, 27 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1137 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 5.7 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 2,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.7 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 38.9950, -122.4630. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 27 km (17 mi) ESE of here earthquakes near Lake County
Colusa County, CA 28 km (17 mi) SW of here earthquakes near Colusa County
Napa County, CA 56 km (35 mi) NNW of here earthquakes near Napa County
Yolo County, CA 60 km (37 mi) NW of here earthquakes near Yolo County
Sutter County, CA 66 km (41 mi) W of here earthquakes near Sutter County
Sonoma County, CA 66 km (41 mi) NE of here earthquakes near Sonoma 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. 1.5 4 km W of Cobb, CA
  2. 1.7 14 km ESE of Lake Pillsbury, CA
  3. 1.7 1 km NE of The Geysers, CA
  4. 1.7 3 km NNW of The Geysers, CA
  5. 1.5 2 km W of Anderson Springs, CA
  6. 1.7 8 km WNW of Cobb, CA
  7. 1.6 3 km NE of The Geysers, CA
  8. 1.8 18 km SE of Lake Pillsbury, CA
  9. 2.5 18 km NNE of Upper Lake, CA
  10. 1.7 10 km WNW of The Geysers, CA
  11. 1.6 7 km WNW of Cobb, CA
  12. 1.6 2 km NW of The Geysers, CA
  13. 1.9 7 km NW of The Geysers, CA
  14. 1.6 1 km NE of The Geysers, CA
  15. 1.8 7 km 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 5.1 on 2016-08-10 — it released about 230,000 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.