QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

41km SE of Hayfork, CA

· 8.9 km deep · released about 62 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 46 kmTehama County 54 kmShasta County 84 kmGlenn County 85 kmHumboldt County 103 kmMendocino County 109 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 2.2 (md)
Depth
8.9 km below the surface
Felt
no reports yet
Nearest
Trinity County, 46 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2244 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 62 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 240,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 170,000× the energy of this one
  3. Around the size people start to feel M 3.0 15× the energy of this one
  4. This earthquake M 2.2 about 62 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 40.2965, -122.8313. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 46 km (28 mi) SSE of here earthquakes near Trinity County
Tehama County, CA 54 km (34 mi) WNW of here earthquakes near Tehama County
Shasta County, CA 84 km (52 mi) SW of here earthquakes near Shasta County
Glenn County, CA 85 km (53 mi) NNW of here earthquakes near Glenn County
Humboldt County, CA 103 km (64 mi) ESE of here earthquakes near Humboldt County
Mendocino County, CA 109 km (68 mi) NNE of here earthquakes near Mendocino County

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

Aftershocks so far

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

  1. 2.0 41km NE of Covelo, CA
  2. 2.1 26km W of Rancho Tehama Reserve, CA
  3. 2.1 41km NE of Covelo, CA
  4. 2.3 38km NNE of Covelo, CA
  5. 2.9 40km NNE of Covelo, CA
  6. 2.7 41km NNE of Covelo, CA
  7. 2.2 7km NNW of Hayfork, CA
  8. 2.3 26km S of Hayfork, CA
  9. 2.2 27km WSW of Rancho Tehama Reserve, CA
  10. 2.1 27km SE of Hayfork, CA
  11. 2.2 42km NE of Covelo, CA
  12. 1.8 6km ENE of Shasta, CA
  13. 2.3 41km NE of Covelo, CA
  14. 1.9 37km NE of Covelo, CA
  15. 2.4 8km WNW of Hayfork, 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.