QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

16km NNW of Covelo, CA

· 9.1 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 57 kmTrinity County 81 kmGlenn County 85 kmTehama County 94 kmHumboldt County 101 kmLake County 104 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
9.1 km below the surface
Felt
no reports yet
Nearest
Mendocino County, 57 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3109 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 39.9332, -123.3037. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 57 km (35 mi) NNE of here earthquakes near Mendocino County
Trinity County, CA 81 km (50 mi) SSW of here earthquakes near Trinity County
Glenn County, CA 85 km (53 mi) WNW of here earthquakes near Glenn County
Tehama County, CA 94 km (58 mi) WSW of here earthquakes near Tehama County
Humboldt County, CA 101 km (63 mi) SSE of here earthquakes near Humboldt County
Lake County, CA 104 km (64 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. 2.5 40km SSE of Hayfork, CA
  2. 2.3 38km SSE of Hayfork, CA
  3. 1.8 38km W of Rancho Tehama Reserve, CA
  4. 1.8 37km WNW of Rancho Tehama Reserve, CA
  5. 2.1 31km NNW of Alder Springs, CA
  6. 1.5 19km NNW of Alder Springs, CA
  7. 2.1 34km ENE of Redway, CA
  8. 2.1 13km NNE of Rockport, CA
  9. 1.6 5km NW of Laytonville, CA
  10. 1.9 13km N of Brooktrails, CA
  11. 1.8 7km ENE of Covelo, CA
  12. 1.8 28km SE of Redway, CA
  13. 2.0 37km NNE of Covelo, CA
  14. 2.2 40km NE of Covelo, CA
  15. 1.8 28km NNW of Alder Springs, 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 2017-12-14 — it released about 12,000 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.