QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

36km NE of Covelo, CA

· 5.0 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 61 kmGlenn County 63 kmTrinity County 73 kmMendocino County 77 kmLake County 101 kmColusa County 109 kmShasta County 113 kmHumboldt County 115 kmButte County 119 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 1.8 (md)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Tehama County, 61 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2455 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 40.0027, -122.9277. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 61 km (38 mi) WSW of here earthquakes near Tehama County
Glenn County, CA 63 km (39 mi) NW of here earthquakes near Glenn County
Trinity County, CA 73 km (46 mi) SSE of here earthquakes near Trinity County
Mendocino County, CA 77 km (48 mi) NE of here earthquakes near Mendocino County
Lake County, CA 101 km (63 mi) N of here earthquakes near Lake County
Colusa County, CA 109 km (68 mi) NNW of here earthquakes near Colusa 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. 1.6 13km NW of Covelo, CA
  2. 1.8 12km WNW of Covelo, CA
  3. 1.5 12km NW of Covelo, CA
  4. 1.5 12km WNW of Covelo, CA
  5. 2.3 12km WNW of Covelo, CA
  6. 1.7 12km NW of Covelo, CA
  7. 2.6 12km NW of Covelo, CA
  8. 1.8 13km NW of Covelo, CA
  9. 1.6 10km NW of Covelo, CA
  10. 2.1 12km NW of Covelo, CA
  11. 2.7 12km WNW of Covelo, CA
  12. 1.6 13km NW of Covelo, CA
  13. 1.5 12km NW of Covelo, CA
  14. 1.8 12km WNW of Covelo, CA
  15. 1.7 13km NW 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.