QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

20km N of Covelo, CA

· 8.7 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 63 kmTrinity County 76 kmGlenn County 83 kmTehama County 88 kmHumboldt County 100 kmLake County 105 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 1.6 (md)
Depth
8.7 km below the surface
Felt
no reports yet
Nearest
Mendocino County, 63 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3013 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 6.4 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 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 39.9735, -123.2438. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 63 km (39 mi) NNE of here earthquakes near Mendocino County
Trinity County, CA 76 km (47 mi) S of here earthquakes near Trinity County
Glenn County, CA 83 km (52 mi) WNW of here earthquakes near Glenn County
Tehama County, CA 88 km (55 mi) W of here earthquakes near Tehama County
Humboldt County, CA 100 km (62 mi) SE of here earthquakes near Humboldt County
Lake County, CA 105 km (65 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

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

  1. 2.0 13km S of Laytonville, CA
  2. 2.1 32km NNW of Covelo, CA
  3. 1.8 34km ENE of Covelo, CA
  4. 1.9 21km N of Laytonville, CA
  5. 2.0 34km SW of Hayfork, CA
  6. 1.8 15km NW of Alder Springs, CA
  7. 1.9 30km SW of Hayfork, CA
  8. 2.5 20km NNW of Alder Springs, CA
  9. 1.6 20km NNW of Alder Springs, CA
  10. 2.1 20km NNW of Alder Springs, CA
  11. 1.8 13km SSE of Laytonville, CA
  12. 1.6 10km SSE of Laytonville, CA
  13. 1.8 19km SSE of Hayfork, CA
  14. 1.9 36km SSE of Hayfork, CA
  15. 1.9 4km NNE of Laytonville, 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 4.1 on 2016-11-06 — it released about 5,800 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.