QuakeIndex

Earthquake · reviewed by a seismologist

M 4.3mw

16 km WSW of Klamath, CA

· 36 km deep · released about 47 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Del Norte County 33 kmHumboldt County 91 kmCurry County 108 kmJosephine County 112 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 4.3 (mw)
Depth
36 km below the surface
Felt
200 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
USGS impact alert
green
Nearest
Del Norte County, 33 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 263 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 200 people have reported feeling it to USGS.

How big was it?

This earthquake released about 47 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 3,600× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 160× the energy of this one
  3. Magna, Utah 2020 M 5.7 110× the energy of this one
  4. This earthquake M 4.3 about 47 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 99× more

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 41.4990, -124.2015. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Del Norte County, CA 33 km (21 mi) SSW of here earthquakes near Del Norte County
Humboldt County, CA 91 km (57 mi) NNW of here earthquakes near Humboldt County
Curry County, OR 108 km (67 mi) S of here earthquakes near Curry County
Josephine County, OR 112 km (69 mi) SSW of here earthquakes near Josephine County
Trinity County, CA 131 km (82 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

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

  1. 2.4 20 km SE of Klamath, CA
  2. 2.3 4 km ENE of Trinidad, CA
  3. 1.9 12 km NE of Westhaven-Moonstone, CA
  4. 2.4 38 km WNW of Trinidad, CA
  5. 2.2 14 km NNW of Trinidad, CA
  6. 3.2 28 km NW of Trinidad, CA
  7. 2.4 14 km SSW of Crescent City, CA
  8. 2.3 17 km NNW of Trinidad, CA
  9. 2.1 12 km NE of Westhaven-Moonstone, CA
  10. 2.5 14 km SSW of Bertsch-Oceanview, CA
  11. 1.9 12 km WSW of Smith River, California
  12. 2.8 18 km SSE of Klamath, CA
  13. 2.7 13 km SSW of Bertsch-Oceanview, CA
  14. 2.6 18 km SSW of Brookings, OR
  15. 2.2 6 km W of Klamath, 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.

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

On USGS

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