QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

20km NNW of Trinidad, CA

· 17 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Del Norte County 61 kmHumboldt County 63 kmTrinity County 113 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
17 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Del Norte County, 61 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2868 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 85 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 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× 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 85 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 41.2322, -124.2133. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Del Norte County, CA 61 km (38 mi) SSW of here earthquakes near Del Norte County
Humboldt County, CA 63 km (39 mi) NNW of here earthquakes near Humboldt County
Trinity County, CA 113 km (70 mi) NW of here earthquakes near Trinity County

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

Aftershocks so far

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

  1. 4.3 16 km WSW of Klamath, CA
  2. 2.2 6 km NE of Westhaven-Moonstone, CA
  3. 2.6 13 km NNW of Trinidad, CA
  4. 2.9 4 km SW of Westhaven-Moonstone, CA
  5. 2.8 1 km SSE of Arcata, CA
  6. 2.1 18 km WNW of Willow Creek, CA
  7. 3.8 14 km W of McKinleyville, CA
  8. 2.3 6 km WSW of Arcata, CA
  9. 2.5 22km S of Klamath, CA
  10. 2.1 8km ENE of Blue Lake, CA
  11. 2.8 17km NNW of Trinidad, CA
  12. 2.3 16km WNW of Klamath, CA
  13. 4.3 16km WSW of Weitchpec, CA
  14. 3.7 16km WSW of Weitchpec, CA
  15. 3.6 6km E of McKinleyville, 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.