QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

17km SSE of Hayfork, CA

· 26 km deep · released about 260 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 27 kmHumboldt County 74 kmTehama County 83 kmShasta County 101 kmGlenn County 109 kmMendocino County 111 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 2.6 (md)
Depth
26 km below the surface
Felt
no reports yet
Nearest
Trinity County, 27 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2588 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 260 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 59,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 42,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.7× the energy of this one
  4. This earthquake M 2.6 about 260 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 40.4038, -123.1417. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 27 km (17 mi) S of here earthquakes near Trinity County
Humboldt County, CA 74 km (46 mi) ESE of here earthquakes near Humboldt County
Tehama County, CA 83 km (52 mi) WNW of here earthquakes near Tehama County
Shasta County, CA 101 km (63 mi) WSW of here earthquakes near Shasta County
Glenn County, CA 109 km (68 mi) NW of here earthquakes near Glenn County
Mendocino County, CA 111 km (69 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

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

  1. 2.1 32km W of Hayfork, CA
  2. 2.1 30km NE of Redway, CA
  3. 1.6 35km E of Hydesville, CA
  4. 2.1 41km NE of Covelo, CA
  5. 4.0 20km ENE of Redway, CA
  6. 2.3 38km NNE of Covelo, CA
  7. 2.9 40km NNE of Covelo, CA
  8. 2.7 41km NNE of Covelo, CA
  9. 2.2 7km NNW of Hayfork, CA
  10. 1.8 35km S of Willow Creek, CA
  11. 2.3 26km S of Hayfork, CA
  12. 1.9 29km NE of Redway, CA
  13. 2.0 19km NE of Redway, CA
  14. 2.1 27km SE of Hayfork, CA
  15. 2.2 42km NE 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 640 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.