QuakeIndex

Earthquake · reviewed by a seismologist

M 4.3mw

36km NE of Redway, CA

· 33 km deep · released about 46 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 48 kmHumboldt County 53 kmMendocino County 102 kmTehama 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
33 km below the surface
Felt
67 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Trinity County, 48 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1291 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 67 people have reported feeling it to USGS.

How big was it?

This earthquake released about 46 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 3,700× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 170× the energy of this one
  3. Magna, Utah 2020 M 5.7 120× the energy of this one
  4. This earthquake M 4.3 about 46 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 95× 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 40.3495, -123.5185. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 48 km (30 mi) SW of here earthquakes near Trinity County
Humboldt County, CA 53 km (33 mi) SE of here earthquakes near Humboldt County
Mendocino County, CA 102 km (63 mi) N of here earthquakes near Mendocino County
Tehama County, CA 112 km (70 mi) WNW of here earthquakes near Tehama County
Glenn County, CA 126 km (78 mi) NW of here earthquakes near Glenn County

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

Aftershocks so far

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

  1. 2.3 14km SE of Rio Dell, CA
  2. 2.4 12km SE of Rio Dell, CA
  3. 1.8 11km SE of Rio Dell, CA
  4. 2.1 11km SE of Rio Dell, CA
  5. 5.3 15km SE of Rio Dell, CA
  6. 2.2 17km E of Hydesville, CA
  7. 2.3 3km NE of Redway, CA
  8. 2.5 8km E of Hydesville, CA
  9. 2.2 19km E of Rio Dell, CA
  10. 1.8 18km E of Hydesville, CA
  11. 2.1 11km E of Hydesville, CA
  12. 1.8 11km E of Hydesville, CA
  13. 2.2 10km ENE of Hydesville, CA
  14. 4.2 8km E of Hydesville, CA
  15. 1.8 18km NE of Hydesville, 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 4.5 on 2016-08-28 — it released about 1.8 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.