QuakeIndex

Earthquake · automatic estimate, may change

M 2.2md

12 km ENE of Hayfork, CA

· 19 km deep · released about 54 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 8 kmHumboldt County 74 kmTehama County 87 kmShasta County 87 kmSiskiyou 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 2.2 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Trinity County, 8 km NW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 661 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 54 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 5.8 280,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 54 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 40.5960, -123.0560. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 8 km (5 mi) SE of here earthquakes near Trinity County
Humboldt County, CA 74 km (46 mi) E of here earthquakes near Humboldt County
Tehama County, CA 87 km (54 mi) NW of here earthquakes near Tehama County
Shasta County, CA 87 km (54 mi) WSW of here earthquakes near Shasta County
Siskiyou County, CA 119 km (74 mi) SSW of here earthquakes near Siskiyou County
Glenn County, CA 124 km (77 mi) NNW of here earthquakes near Glenn County

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

Aftershocks so far

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

  1. 2.0 26 km S of Hayfork, CA
  2. 1.9 28 km W of Hayfork, CA
  3. 2.4 8 km SSW of French Gulch, CA
  4. 1.9 20 km SW of Hayfork, CA
  5. 2.2 20 km SW of Hayfork, CA
  6. 2.6 40 km S of Hayfork, CA
  7. 1.9 12 km WNW of Hayfork, CA
  8. 2.8 24 km WNW of Weaverville, CA
  9. 2.3 4 km NNE of Hayfork, CA
  10. 1.8 33 km SW of Hayfork, CA
  11. 2.3 43 km SSE of Hayfork, CA
  12. 2.3 21 km E of Willow Creek, CA
  13. 1.8 18 km S of Hayfork, CA
  14. 2.1 28 km W of Hayfork, CA
  15. 2.0 12 km SSW 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2016-08-28 — it released about 3,000 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.