QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

11km SSE of Talmage, CA

· 5.3 km deep · released about 24 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 33 kmMendocino County 51 kmSonoma County 60 kmColusa County 77 kmGlenn County 87 kmNapa County 91 kmYolo County 113 kmMarin County 115 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 1.9 (md)
Depth
5.3 km below the surface
Felt
no reports yet
Nearest
Lake County, 33 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2432 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 24 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 640,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 450,000× the energy of this one
  3. Around the size people start to feel M 3.0 40× the energy of this one
  4. This earthquake M 1.9 about 24 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 39.0465, -123.1158. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 33 km (20 mi) WSW of here earthquakes near Lake County
Mendocino County, CA 51 km (32 mi) SSE of here earthquakes near Mendocino County
Sonoma County, CA 60 km (37 mi) NNW of here earthquakes near Sonoma County
Colusa County, CA 77 km (48 mi) W of here earthquakes near Colusa County
Glenn County, CA 87 km (54 mi) SW of here earthquakes near Glenn County
Napa County, CA 91 km (57 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

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

  1. 2.2 5km NW of The Geysers, CA
  2. 2.1 4km WNW of Cobb, CA
  3. 2.1 11km NNE of Talmage, CA
  4. 2.1 4km NW of Redwood Valley, CA
  5. 1.9 7km NW of The Geysers, CA
  6. 2.1 3km W of Anderson Springs, CA
  7. 1.6 7km NW of The Geysers, CA
  8. 1.8 16km ESE of Navarro Head, CA
  9. 2.1 7km NW of The Geysers, CA
  10. 2.8 2km SE of The Geysers, CA
  11. 2.0 1km E of The Geysers, CA
  12. 1.9 19km NW of Cloverdale, CA
  13. 2.4 6km NNW of The Geysers, CA
  14. 2.7 2km NE of The Geysers, CA
  15. 1.9 2km SW 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 5.1 on 2016-08-10 — it released about 55,000 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.