QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

13km W of Lakeport, CA

· 3.2 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 29 kmMendocino County 56 kmSonoma County 57 kmColusa County 74 kmNapa County 86 kmGlenn County 86 kmYolo County 108 kmMarin County 112 kmSutter County 118 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 2.5 (md)
Depth
3.2 km below the surface
Felt
7 reports · strongest reported intensity III
Nearest
Lake County, 29 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1709 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 86,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 61,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.4× the energy of this one
  4. This earthquake M 2.5 about 180 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 39.0222, -123.0682. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 29 km (18 mi) WSW of here earthquakes near Lake County
Mendocino County, CA 56 km (35 mi) SE of here earthquakes near Mendocino County
Sonoma County, CA 57 km (35 mi) NNW of here earthquakes near Sonoma County
Colusa County, CA 74 km (46 mi) WSW of here earthquakes near Colusa County
Napa County, CA 86 km (54 mi) NW of here earthquakes near Napa County
Glenn County, CA 86 km (54 mi) SW of here earthquakes near Glenn County

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

Aftershocks so far

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

  1. 1.5 7km W of Cobb, CA
  2. 2.0 0km NE of The Geysers, CA
  3. 2.0 5km W of Cobb, CA
  4. 1.7 3km W of Anderson Springs, CA
  5. 2.0 20km ESE of Navarro Head, CA
  6. 1.6 3km E of The Geysers, CA
  7. 2.6 8km WNW of Cobb, CA
  8. 1.8 7km WNW of Cobb, CA
  9. 1.5 5km NW of The Geysers, CA
  10. 1.5 5km NNE of Clearlake, CA
  11. 1.7 1km NE of The Geysers, CA
  12. 1.9 7km WSW of The Geysers, CA
  13. 1.5 10km NW of The Geysers, CA
  14. 1.7 4km W of Cobb, CA
  15. 1.6 3km 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 5.1 on 2016-08-10 — it released about 7,400 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.