QuakeIndex

Earthquake · reviewed by a seismologist

M 4.3mw

8km SE of Talmage, CA

· 11 km deep · released about 51 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lake County 30 kmMendocino County 49 kmSonoma County 64 kmColusa County 74 kmGlenn County 82 kmNapa County 93 kmYolo County 112 kmMarin County 119 kmSutter County 120 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 4.3 (mw)
Depth
11 km below the surface
Felt
483 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Nearest
Lake County, 30 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1128 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 483 people have reported feeling it to USGS.

How big was it?

This earthquake released about 51 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 3,300× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 150× the energy of this one
  3. Magna, Utah 2020 M 5.7 110× the energy of this one
  4. This earthquake M 4.3 about 51 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 110× more

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 39.0893, -123.0895. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lake County, CA 30 km (19 mi) W of here earthquakes near Lake County
Mendocino County, CA 49 km (30 mi) SE of here earthquakes near Mendocino County
Sonoma County, CA 64 km (40 mi) NNW of here earthquakes near Sonoma County
Colusa County, CA 74 km (46 mi) W of here earthquakes near Colusa County
Glenn County, CA 82 km (51 mi) SW of here earthquakes near Glenn County
Napa County, CA 93 km (58 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. 2.1 11 km ESE of Talmage, CA
  2. 1.7 2 km WNW of Anderson Springs, CA
  3. 2.2 3 km ENE of The Geysers, CA
  4. 1.5 2 km WNW of Anderson Springs, CA
  5. 3.2 3 km ESE of The Geysers, CA
  6. 2.7 6 km W of Cobb, CA
  7. 2.0 7 km NW of The Geysers, CA
  8. 1.8 12 km NW of The Geysers, CA
  9. 1.6 7 km NW of The Geysers, CA
  10. 1.6 3 km SSE of The Geysers, CA
  11. 1.7 3 km SSE of The Geysers, CA
  12. 2.4 3 km SE of The Geysers, CA
  13. 2.1 6 km WNW of The Geysers, CA
  14. 2.9 6 km NW of The Geysers, CA
  15. 2.5 6 km 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 13 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.