QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

16 km NNE of Trinity Village, California

· 36 km deep · released about 38 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Trinity County 49 kmHumboldt County 53 kmDel Norte County 94 kmSiskiyou County 99 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 2.1 (md)
Depth
36 km below the surface
Felt
no reports yet
Nearest
Trinity County, 49 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3369 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 38 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 41.0105, -123.4388. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Trinity County, CA 49 km (30 mi) NW of here earthquakes near Trinity County
Humboldt County, CA 53 km (33 mi) NE of here earthquakes near Humboldt County
Del Norte County, CA 94 km (58 mi) SSE of here earthquakes near Del Norte County
Siskiyou County, CA 99 km (62 mi) SW of here earthquakes near Siskiyou County
Shasta County, CA 121 km (75 mi) WNW of here earthquakes near Shasta County
Tehama County, CA 142 km (88 mi) NW of here earthquakes near Tehama County

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

Aftershocks so far

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

  1. 2.9 22km NNW of Hayfork, CA
  2. 2.5 5km NNW of Somes Bar, CA
  3. 2.0 20km SSE of Willow Creek, CA
  4. 2.2 17km NW of Willow Creek, CA
  5. 2.6 19km NNW of Hayfork, CA
  6. 2.6 11km E of Blue Lake, CA
  7. 2.1 13km ESE of Blue Lake, CA
  8. 2.4 14km ESE of Blue Lake, CA
  9. 4.4 13km ESE of Blue Lake, CA
  10. 3.3 14km ESE of Willow Creek, CA
  11. 2.3 20km ENE of Willow Creek, CA
  12. 2.0 14km WNW of Hayfork, CA
  13. 1.9 23km NNW of Hayfork, CA
  14. 3.4 6km NE of Willow Creek, CA
  15. 1.6 29km NNW 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 4.8 on 2016-07-21 — it released about 13,000 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.