QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

12km W of Lakeport, CA

· 6.8 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 28 kmMendocino County 54 kmSonoma County 59 kmColusa County 72 kmGlenn County 84 kmNapa County 87 kmYolo County 108 kmMarin County 114 kmSutter County 117 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
6.8 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Lake County, 28 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1473 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 12 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 39.0448, -123.0560. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 28 km (17 mi) WSW of here earthquakes near Lake County
Mendocino County, CA 54 km (34 mi) SE of here earthquakes near Mendocino County
Sonoma County, CA 59 km (37 mi) N of here earthquakes near Sonoma County
Colusa County, CA 72 km (45 mi) WSW of here earthquakes near Colusa County
Glenn County, CA 84 km (52 mi) SW of here earthquakes near Glenn County
Napa County, CA 87 km (54 mi) NW of here earthquakes near Napa 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 3km SE of The Geysers, CA
  2. 1.7 5km WNW of Cobb, CA
  3. 1.7 5km WNW of Cobb, CA
  4. 1.7 10km SE of Talmage, CA
  5. 1.5 10km WNW of The Geysers, CA
  6. 1.6 2km NW of The Geysers, CA
  7. 1.6 2km NW of The Geysers, CA
  8. 2.7 9km SE of Talmage, CA
  9. 1.7 13km NW of The Geysers, CA
  10. 1.7 3km W of Cobb, CA
  11. 1.6 6km W of Cobb, CA
  12. 1.9 1km NW of The Geysers, CA
  13. 1.7 3km SW of Anderson Springs, CA
  14. 1.9 2km NNE of The Geysers, CA
  15. 2.0 3km WSW of Anderson Springs, 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 110,000 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.