QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

29km NE of Willow Creek, CA

· 36 km deep · released about 140 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 53 kmHumboldt County 65 kmSiskiyou County 88 kmDel Norte County 90 kmShasta County 116 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
36 km below the surface
Felt
no reports yet
Nearest
Trinity County, 53 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2145 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 140 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 5.8 110,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 78,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.9× the energy of this one
  4. This earthquake M 2.4 about 140 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 41.0935, -123.3537. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 53 km (33 mi) NNW of here earthquakes near Trinity County
Humboldt County, CA 65 km (40 mi) NE of here earthquakes near Humboldt County
Siskiyou County, CA 88 km (55 mi) SW of here earthquakes near Siskiyou County
Del Norte County, CA 90 km (56 mi) SE of here earthquakes near Del Norte County
Shasta County, CA 116 km (72 mi) WNW of here earthquakes near Shasta County
Tehama County, CA 143 km (89 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

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

  1. 2.4 17km ENE of Willow Creek, 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. 2.1 26km ESE of Willow Creek, CA
  8. 2.4 7km S of Somes Bar, CA
  9. 3.2 16km WSW of Weitchpec, CA
  10. 3.0 12km SSW of Somes Bar, CA
  11. 2.1 22km E of Willow Creek, CA
  12. 2.0 10km NNW of Willow Creek, CA
  13. 2.1 30km WNW of Weaverville, CA
  14. 2.9 30km WNW of Weaverville, CA
  15. 2.5 5km SSE of Weitchpec, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2019-02-06 — it released about 840 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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