QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

29 km NW of Covelo, CA

· 8.0 km deep · released about 5.9 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mendocino County 64 kmTrinity County 76 kmHumboldt County 88 kmGlenn County 99 kmTehama County 103 kmLake County 116 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
8.0 km below the surface
Felt
no reports yet
Nearest
Mendocino County, 64 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 41 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 5.9 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 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 160× the energy of this one
  4. This earthquake M 1.5 about 5.9 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 40.0075, -123.4358. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mendocino County, CA 64 km (40 mi) N of here earthquakes near Mendocino County
Trinity County, CA 76 km (47 mi) SSW of here earthquakes near Trinity County
Humboldt County, CA 88 km (55 mi) SSE of here earthquakes near Humboldt County
Glenn County, CA 99 km (62 mi) WNW of here earthquakes near Glenn County
Tehama County, CA 103 km (64 mi) W of here earthquakes near Tehama County
Lake County, CA 116 km (72 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

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

  1. 2.2 32 km NE of Redway, CA
  2. 1.7 16 km NNW of Redway, CA
  3. 1.4 13 km SSE of Redway, CA
  4. 1.8 3 km SE of Redway, CA
  5. 1.7 29 km N of Redway, CA
  6. 2.2 25 km NW of Alder Springs, CA
  7. 1.6 4 km ESE of Redway, CA
  8. 1.6 2 km ENE of Redway, CA
  9. 1.8 1 km N of Redway, CA
  10. 1.8 7 km E of Covelo, CA
  11. 1.7 29 km WSW of Hayfork, CA
  12. 1.9 10 km ENE of Rockport, CA
  13. 1.7 10 km ENE of Rockport, CA
  14. 2.7 32 km NNW of Covelo, CA
  15. 1.9 8 km N 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 28,000 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.