QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

Earthquake near Weaverville, CA

No earthquake was likely felt in Weaverville in the 24 hours to 9:50 pm PST (05:50 UTC). The last one was M 3.7, 65 km (40 mi) WSW, at 2:44 pm PDT on 7 September 2026, estimated intensity II (weak) in town; 15 felt reports to USGS. Every earthquake near Weaverville

This page: a magnitude 2.2 earthquake was recorded 28 km (18 mi) northwest of Weaverville, CA, at 3:17 pm PDT on 25 June 2021 (22:17 UTC), 32 km deep.

USGS: 28km NW of Weaverville, CA

3:17 pm PDT, Jun 25, 2021 · · 32 km deep · released about 56 lb of TNT

10 km30 km60 km120 km N Trinity County 27 kmHumboldt County 63 kmSiskiyou County 97 kmShasta County 99 kmDel Norte County 116 kmTehama County 118 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
3:17 pm PDT on 25 June 2021 ()
Where
28 km (18 mi) northwest of Weaverville, CA · earthquakes near Weaverville
Magnitude
M 2.2 (md)
Depth
32 km below the surface
Felt
no reports yet
Nearest
Trinity County, 27 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1965 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Weaverville, 28 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 56 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 5.8 270,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 190,000× the energy of this one
  3. Around the size people start to feel M 3.0 17× the energy of this one
  4. This earthquake M 2.2 about 56 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.6 15 km SW of Burnt Ranch, California · 39 km WSW of this epicentre
  2. 5.4 3 km NNW of Burnt Ranch, California · 25 km WSW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 40.8842, -123.2100. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Trinity County, CA 27 km (17 mi) SSE earthquakes near Trinity County
Humboldt County, CA 63 km (39 mi) WSW earthquakes near Humboldt County
Siskiyou County, CA 97 km (60 mi) NE earthquakes near Siskiyou County
Shasta County, CA 99 km (62 mi) E earthquakes near Shasta County
Del Norte County, CA 116 km (72 mi) NNW earthquakes near Del Norte County
Tehama County, CA 118 km (73 mi) SE earthquakes near Tehama County

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

Aftershocks so far

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

  1. 2.4 17km E of Willow Creek, CA
  2. 2.2 20km WSW of Hayfork, CA
  3. 2.9 5km N of Willow Creek, CA
  4. 2.1 29km E of Willow Creek, CA
  5. 2.7 21km ESE of Weitchpec, CA
  6. 2.1 28km WNW of Hayfork, CA
  7. 2.3 15km E of Willow Creek, CA
  8. 2.2 17km S of Weaverville, CA
  9. 2.4 17km ENE of Willow Creek, CA
  10. 1.8 20km SSE of Willow Creek, CA
  11. 2.1 25km WNW of Weaverville, CA
  12. 2.0 7km W of Willow Creek, CA
  13. 2.4 14km E of Willow Creek, CA
  14. 2.3 28km ENE of Willow Creek, CA
  15. 2.1 26km ESE of Willow Creek, 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.