QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

22km S of Klamath, CA

· 33 km deep · released about 190 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Del Norte County 46 kmHumboldt County 71 kmTrinity County 109 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 2.5 (md)
Depth
33 km below the surface
Felt
no reports yet
Nearest
Del Norte County, 46 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1114 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 190 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 80,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 57,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.1× the energy of this one
  4. This earthquake M 2.5 about 190 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 41.3407, -124.0335. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Del Norte County, CA 46 km (28 mi) S of here earthquakes near Del Norte County
Humboldt County, CA 71 km (44 mi) N of here earthquakes near Humboldt County
Trinity County, CA 109 km (68 mi) NW of here earthquakes near Trinity County
Josephine County, OR 122 km (76 mi) SSW of here earthquakes near Josephine County
Jackson County, OR 164 km (102 mi) SW of here earthquakes near Jackson County

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

Aftershocks so far

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

  1. 2.2 10 km NNW of Willow Creek, CA
  2. 2.4 20 km SE of Klamath, CA
  3. 1.6 11 km NE of Blue Lake, CA
  4. 2.3 4 km ENE of Trinidad, CA
  5. 2.3 13 km E of Weitchpec, CA
  6. 1.9 12 km NE of Westhaven-Moonstone, CA
  7. 2.4 38 km WNW of Trinidad, CA
  8. 2.2 14 km NNW of Trinidad, CA
  9. 3.2 28 km NW of Trinidad, CA
  10. 2.4 8 km SSE of Weitchpec, CA
  11. 1.8 8 km ESE of Westhaven-Moonstone, CA
  12. 3.2 4 km NNE of Blue Lake, CA
  13. 2.1 6 km NW of Somes Bar, CA
  14. 2.0 14 km WNW of Willow Creek, CA
  15. 2.4 14 km SSW of Crescent City, 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 4.3 on 2023-01-20 — it released about 390 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.