QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

9km N of French Gulch, CA

· 12 km deep · released about 290 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 42 kmShasta County 51 kmTehama County 82 kmSiskiyou County 89 kmHumboldt County 108 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 2.7 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Trinity County, 42 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1546 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 290 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 51,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 36,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.2× the energy of this one
  4. This earthquake M 2.7 about 290 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 40.7880, -122.6485. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 42 km (26 mi) ENE of here earthquakes near Trinity County
Shasta County, CA 51 km (32 mi) W of here earthquakes near Shasta County
Tehama County, CA 82 km (51 mi) NNW of here earthquakes near Tehama County
Siskiyou County, CA 89 km (56 mi) S of here earthquakes near Siskiyou County
Humboldt County, CA 108 km (67 mi) E of here earthquakes near Humboldt County
Del Norte County, CA 154 km (96 mi) SE of here earthquakes near Del Norte County

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

Aftershocks so far

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

  1. 1.5 9km NE of Shasta Lake, CA
  2. 2.0 11km NW of Shasta Lake, CA
  3. 1.6 24km WSW of Big Bend, CA
  4. 1.5 3km NE of Shasta Lake, CA
  5. 1.8 9km NE of Shasta Lake, CA
  6. 2.1 13km S of Dunsmuir, CA
  7. 2.2 12km NNE of Bella Vista, CA
  8. 1.9 8km ENE of Shasta Lake, CA
  9. 1.8 13km NNE of Bella Vista, CA
  10. 2.1 12km NNE of Bella Vista, CA
  11. 2.0 1km SE of Palo Cedro, CA
  12. 2.5 5km SW of Palo Cedro, CA
  13. 1.7 4km ESE of Redding, CA
  14. 1.7 6km W of Bella Vista, CA
  15. 2.1 24km N of Shasta Lake, 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.