QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

11 km WSW of Covelo, California

· 6.0 km deep · released about 830 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 37 kmGlenn County 85 kmLake County 91 kmTrinity County 101 kmTehama County 106 kmHumboldt County 115 kmColusa County 118 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 3.0 (md)
Depth
6.0 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Mendocino County, 37 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3406 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 830 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 410,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 18,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 830 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 39.7608, -123.3793. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 37 km (23 mi) N of here earthquakes near Mendocino County
Glenn County, CA 85 km (53 mi) WNW of here earthquakes near Glenn County
Lake County, CA 91 km (56 mi) NW of here earthquakes near Lake County
Trinity County, CA 101 km (63 mi) SSW of here earthquakes near Trinity County
Tehama County, CA 106 km (66 mi) WSW of here earthquakes near Tehama County
Humboldt County, CA 115 km (71 mi) SSE of here earthquakes near Humboldt County

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

Aftershocks so far

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

  1. 1.6 3 km W of Covelo, California
  2. 2.3 near the coast of Northern California
  3. 2.3 5 km WNW of Covelo, California
  4. 1.6 24 km NE of Potter Valley, California
  5. 1.7 near the coast of Northern California
  6. 1.7 25 km SE of Covelo, California
  7. 1.7 8 km NNE of Brooktrails, California
  8. 1.6 5 km WNW of Covelo, California
  9. 2.6 13 km WSW of Laytonville, California
  10. 1.9 16 km NE of Potter Valley, California
  11. 1.7 5 km WNW of Covelo, California
  12. 1.8 5 km WNW of Covelo, California
  13. 2.0 5 km WNW of Covelo, California
  14. 1.8 17 km NE of Leggett, California
  15. 1.6 28 km WSW of Paskenta, California

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 4.1 on 2016-11-06 — it released about 45 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.