QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

6km SE of French Gulch, CA

· 20 km deep · released about 98 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 46 kmShasta County 46 kmTehama County 67 kmSiskiyou County 102 kmHumboldt County 114 kmGlenn 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 2.3 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Trinity County, 46 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2216 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 98 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 150,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 110,000× the energy of this one
  3. Around the size people start to feel M 3.0 9.8× the energy of this one
  4. This earthquake M 2.3 about 98 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 40.6700, -122.5758. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 46 km (28 mi) E of here earthquakes near Trinity County
Shasta County, CA 46 km (29 mi) WSW of here earthquakes near Shasta County
Tehama County, CA 67 km (42 mi) NNW of here earthquakes near Tehama County
Siskiyou County, CA 102 km (63 mi) S of here earthquakes near Siskiyou County
Humboldt County, CA 114 km (71 mi) E of here earthquakes near Humboldt County
Glenn County, CA 120 km (74 mi) N of here earthquakes near Glenn County

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

Aftershocks so far

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

  1. 1.5 1km NW of Palo Cedro, CA
  2. 1.6 1km SW of Palo Cedro, CA
  3. 2.3 15km W of Weaverville, CA
  4. 1.7 2km WSW of Palo Cedro, CA
  5. 1.6 2km W of Palo Cedro, CA
  6. 1.5 6km ESE of Bella Vista, CA
  7. 1.6 8km NE of Shasta Lake, CA
  8. 1.6 10km WSW of Round Mountain, CA
  9. 1.6 2km E of Palo Cedro, CA
  10. 1.5 6km NNE of Millville, CA
  11. 2.1 12km NNE of Shasta Lake, CA
  12. 1.8 9km NE of Shasta Lake, CA
  13. 1.6 5km N of Millville, CA
  14. 2.0 18km WNW of Round Mountain, CA
  15. 1.6 9km E of Millville, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.