QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

18 km WSW of Shasta, CA

· 12 km deep · released about 110 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 38 kmTehama County 59 kmShasta County 60 kmGlenn County 106 kmHumboldt County 106 kmSiskiyou County 119 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 2.4 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Trinity County, 38 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1105 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 110 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 99,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.8× the energy of this one
  4. This earthquake M 2.4 about 110 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 40.5287, -122.6898. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 38 km (24 mi) ESE of here earthquakes near Trinity County
Tehama County, CA 59 km (37 mi) NW of here earthquakes near Tehama County
Shasta County, CA 60 km (37 mi) WSW of here earthquakes near Shasta County
Glenn County, CA 106 km (66 mi) NNW of here earthquakes near Glenn County
Humboldt County, CA 106 km (66 mi) E of here earthquakes near Humboldt County
Siskiyou County, CA 119 km (74 mi) S of here earthquakes near Siskiyou County

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

Aftershocks so far

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

  1. 2.1 5 km SSW of Shasta, CA
  2. 1.7 5 km NE of Millville, CA
  3. 1.7 13 km SE of Anderson, CA
  4. 1.8 9 km NE of Shasta Lake, CA
  5. 1.8 2 km NNE of Shasta, CA
  6. 1.8 6 km NNE of Shasta Lake, CA
  7. 1.8 11 km of Hayfork, CA
  8. 1.8 2 km NE of Shasta, CA
  9. 2.1 40 km NW of Rancho Tehama Reserve, CA
  10. 1.9 9 km NE of Shasta Lake, CA
  11. 2.0 39 km NW of Rancho Tehama Reserve, CA
  12. 1.8 9 km NW of Shasta Lake, CA
  13. 1.9 10 km WNW of Shasta Lake, CA
  14. 2.2 43 km NW of Rancho Tehama Reserve, CA
  15. 2.0 14 km SSE of Hayfork, 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.