QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

15km E of Willow Creek, CA

· 26 km deep · released about 88 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 42 kmHumboldt County 46 kmDel Norte County 102 kmSiskiyou County 107 kmShasta County 120 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 2.3 (md)
Depth
26 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Trinity County, 42 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1425 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 88 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 88 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 40.9185, -123.4543. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 42 km (26 mi) NW of here earthquakes near Trinity County
Humboldt County, CA 46 km (29 mi) ENE of here earthquakes near Humboldt County
Del Norte County, CA 102 km (64 mi) SSE of here earthquakes near Del Norte County
Siskiyou County, CA 107 km (67 mi) SW of here earthquakes near Siskiyou County
Shasta County, CA 120 km (75 mi) W of here earthquakes near Shasta County
Tehama County, CA 136 km (84 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

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

  1. 2.1 18 km WNW of Willow Creek, CA
  2. 2.4 14 km SE of Weitchpec, CA
  3. 1.9 24 km SE of Bayside, CA
  4. 2.0 13 km SSE of Willow Creek, CA
  5. 2.8 10km S of Somes Bar, CA
  6. 2.3 30km S of Willow Creek, CA
  7. 2.0 15km SE of Blue Lake, CA
  8. 2.3 37km E of Hydesville, CA
  9. 2.1 18km S of Willow Creek, CA
  10. 2.5 17km SSE of Somes Bar, CA
  11. 2.1 8km ENE of Blue Lake, CA
  12. 1.8 34km E of Hydesville, CA
  13. 2.2 22km SE of Willow Creek, CA
  14. 2.4 24km ENE of Hydesville, CA
  15. 2.5 8km W of Willow Creek, 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 4.8 on 2016-07-21 — it released about 5,600 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.