QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

31km WNW of Weaverville, CA

· 23 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 28 kmHumboldt County 60 kmSiskiyou County 99 kmShasta County 103 kmDel Norte County 114 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 2.5 (md)
Depth
23 km below the surface
Felt
no reports yet
Nearest
Trinity County, 28 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1884 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 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 83,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 59,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.2× the energy of this one
  4. This earthquake M 2.5 about 180 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 40.8810, -123.2530. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 28 km (18 mi) NNW of here earthquakes near Trinity County
Humboldt County, CA 60 km (37 mi) ENE of here earthquakes near Humboldt County
Siskiyou County, CA 99 km (62 mi) SW of here earthquakes near Siskiyou County
Shasta County, CA 103 km (64 mi) W of here earthquakes near Shasta County
Del Norte County, CA 114 km (71 mi) SSE of here earthquakes near Del Norte County
Tehama County, CA 120 km (75 mi) NW of here earthquakes near Tehama County

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

Aftershocks so far

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

  1. 1.6 31km WSW of Hayfork, CA
  2. 1.8 20km SSE of Willow Creek, CA
  3. 2.1 25km WNW of Weaverville, CA
  4. 2.0 7km W of Willow Creek, CA
  5. 2.4 14km E of Willow Creek, CA
  6. 2.3 28km ENE of Willow Creek, CA
  7. 1.7 31km W of Hayfork, CA
  8. 2.1 26km ESE of Willow Creek, CA
  9. 1.9 11km NNE of Lewiston, CA
  10. 1.6 29km W of Hayfork, CA
  11. 2.1 22km E of Willow Creek, CA
  12. 2.6 6km NNW of Hayfork, CA
  13. 2.4 22km SE of Blue Lake, CA
  14. 2.0 10km NNW of Willow Creek, CA
  15. 2.1 30km WNW of Weaverville, 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.