QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

21km NW of Weaverville, CA

· 42 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 24 kmHumboldt County 71 kmShasta County 91 kmSiskiyou County 94 kmTehama County 111 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 2.6 (md)
Depth
42 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Trinity County, 24 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2574 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 40.8648, -123.1145. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 24 km (15 mi) N of here earthquakes near Trinity County
Humboldt County, CA 71 km (44 mi) ENE of here earthquakes near Humboldt County
Shasta County, CA 91 km (56 mi) W of here earthquakes near Shasta County
Siskiyou County, CA 94 km (58 mi) SSW of here earthquakes near Siskiyou County
Tehama County, CA 111 km (69 mi) NW of here earthquakes near Tehama County
Del Norte County, CA 122 km (76 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

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

  1. 2.5 9km NNE of Hayfork, CA
  2. 2.2 9km ESE of Willow Creek, CA
  3. 2.4 21km SSE of Willow Creek, CA
  4. 2.5 16km SSE of Somes Bar, CA
  5. 2.5 8km E of Willow Creek, CA
  6. 2.0 18km ESE of Willow Creek, CA
  7. 2.3 20km ENE of Willow Creek, CA
  8. 2.3 18km E of Willow Creek, CA
  9. 2.4 12km SE of Weitchpec, CA
  10. 2.3 15km W of Weaverville, CA
  11. 2.4 32km W of Hayfork, CA
  12. 2.3 8km E of Willow Creek, CA
  13. 2.1 24km WNW of Weaverville, CA
  14. 2.2 20km SE of Willow Creek, CA
  15. 2.2 28km NW 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.