QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

36km N of Covelo, CA

· 16 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 59 kmMendocino County 79 kmTehama County 80 kmGlenn County 87 kmHumboldt County 91 kmLake County 118 kmShasta County 120 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 1.5 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Trinity County, 59 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2704 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 40.1162, -123.1767. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 59 km (37 mi) S of here earthquakes near Trinity County
Mendocino County, CA 79 km (49 mi) NNE of here earthquakes near Mendocino County
Tehama County, CA 80 km (50 mi) W of here earthquakes near Tehama County
Glenn County, CA 87 km (54 mi) NW of here earthquakes near Glenn County
Humboldt County, CA 91 km (57 mi) SE of here earthquakes near Humboldt County
Lake County, CA 118 km (73 mi) NNW of here earthquakes near Lake County

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

Aftershocks so far

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

  1. 2.4 9km W of Covelo, CA
  2. 1.9 21km NNE of Redway, CA
  3. 2.9 32km SSW of Hayfork, CA
  4. 2.3 26km WSW of Hayfork, CA
  5. 1.8 13km SSE of Covelo, CA
  6. 1.6 24km NW of Alder Springs, CA
  7. 2.6 23km NW of Alder Springs, CA
  8. 1.6 30km NNW of Alder Springs, CA
  9. 1.8 27km ENE of Covelo, CA
  10. 2.1 30km NNW of Alder Springs, CA
  11. 2.3 36km SSW of Hayfork, CA
  12. 1.6 31km WSW of Hayfork, CA
  13. 1.5 13km SE of Covelo, CA
  14. 1.9 12km NNW of Covelo, CA
  15. 1.6 11km NNW of Covelo, 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 31,000 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.