QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

41km NE of Covelo, CA

· 8.0 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tehama County 59 kmGlenn County 67 kmTrinity County 68 kmMendocino County 83 kmLake County 107 kmShasta County 107 kmHumboldt County 112 kmColusa County 114 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 1.9 (md)
Depth
8.0 km below the surface
Felt
no reports yet
Nearest
Tehama County, 59 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2251 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 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 790,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 560,000× the energy of this one
  3. Around the size people start to feel M 3.0 50× the energy of this one
  4. This earthquake M 1.9 about 19 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 40.0590, -122.9163. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tehama County, CA 59 km (36 mi) W of here earthquakes near Tehama County
Glenn County, CA 67 km (42 mi) NW of here earthquakes near Glenn County
Trinity County, CA 68 km (42 mi) SSE of here earthquakes near Trinity County
Mendocino County, CA 83 km (52 mi) NNE of here earthquakes near Mendocino County
Lake County, CA 107 km (66 mi) N of here earthquakes near Lake County
Shasta County, CA 107 km (67 mi) SW of here earthquakes near Shasta County

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

Aftershocks so far

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

  1. 2.3 26km S of Hayfork, CA
  2. 2.2 27km WSW of Rancho Tehama Reserve, CA
  3. 2.1 27km SE of Hayfork, CA
  4. 2.2 42km NE of Covelo, CA
  5. 1.8 11km NW of Covelo, CA
  6. 2.3 12km NNW of Covelo, CA
  7. 1.6 14km SSE of Covelo, CA
  8. 1.6 8km WSW of Covelo, CA
  9. 1.7 12km WNW of Covelo, CA
  10. 1.8 24km NW of Covelo, CA
  11. 1.7 8km WSW of Covelo, CA
  12. 2.1 6km E of Covelo, CA
  13. 2.3 41km NE of Covelo, CA
  14. 1.9 37km NE of Covelo, CA
  15. 1.8 9km SE 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.