QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

12km SE of Weitchpec, CA

· 37 km deep · released about 130 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Humboldt County 54 kmTrinity County 66 kmDel Norte County 77 kmSiskiyou County 103 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
37 km below the surface
Felt
no reports yet
Nearest
Humboldt County, 54 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1825 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 130 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 80,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.2× the energy of this one
  4. This earthquake M 2.4 about 130 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 41.1178, -123.5932. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Humboldt County, CA 54 km (33 mi) NNE of here earthquakes near Humboldt County
Trinity County, CA 66 km (41 mi) NW of here earthquakes near Trinity County
Del Norte County, CA 77 km (48 mi) SSE of here earthquakes near Del Norte County
Siskiyou County, CA 103 km (64 mi) WSW of here earthquakes near Siskiyou County
Tehama County, CA 159 km (99 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

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

  1. 2.9 3km SSE of Somes Bar, CA
  2. 2.0 16km SE of Blue Lake, CA
  3. 2.4 17km E of Willow Creek, CA
  4. 2.9 5km N of Willow Creek, CA
  5. 2.1 29km E of Willow Creek, CA
  6. 4.3 16km WSW of Weitchpec, CA
  7. 3.7 16km WSW of Weitchpec, CA
  8. 2.7 21km ESE of Weitchpec, CA
  9. 3.6 6km E of McKinleyville, CA
  10. 2.7 21km SE of Blue Lake, CA
  11. 2.8 20km SE of Blue Lake, CA
  12. 2.5 24km SE of Blue Lake, CA
  13. 2.3 15km E of Willow Creek, CA
  14. 2.4 17km ENE of Willow Creek, CA
  15. 1.8 20km SSE 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 4.4 on 2019-02-06 — it released about 870 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.