Earthquake · reviewed by a seismologist
M 2.5md
Earthquake near Weaverville, CA
No earthquake was likely felt in Weaverville in the 24 hours to 10:28 pm PST (06:28 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 2.5 earthquake was recorded 31 km (19 mi) west-northwest of Weaverville, CA, at 12:35 pm PDT on 22 May 2021 (19:35 UTC), 23 km deep.
USGS: 31km WNW of Weaverville, CA
- When
- 12:35 pm PDT on 22 May 2021 ()
- Where
- 31 km (19 mi) west-northwest of Weaverville, CA · earthquakes near Weaverville
- Magnitude
- M 2.5 (md)
- Depth
- 23 km below the surface
- Felt
- no reports yet
- Nearest
- Trinity County, 28 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1929 days ago
Earthquake alerts for Weaverville, CA
Get a notification in this browser when USGS records an earthquake near Weaverville, CA. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. In Weaverville, 31 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 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 83,000× the energy of this one
- Magna, Utah 2020 M 5.7 59,000× the energy of this one
- Around the size people start to feel M 3.0 5.2× the energy of this one
- This earthquake M 2.5 about 180 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:
- 5.6 15 km SW of Burnt Ranch, California · 36 km WSW of this epicentre
- 5.4 3 km NNW of Burnt Ranch, California · 21 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 40.8810, -123.2530. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Trinity County, CA | 28 km (18 mi) | SSE | earthquakes near Trinity County |
| Humboldt County, CA | 60 km (37 mi) | WSW | earthquakes near Humboldt County |
| Siskiyou County, CA | 99 km (62 mi) | NE | earthquakes near Siskiyou County |
| Shasta County, CA | 103 km (64 mi) | E | earthquakes near Shasta County |
| Del Norte County, CA | 114 km (71 mi) | NNW | earthquakes near Del Norte County |
| Tehama County, CA | 120 km (75 mi) | SE | earthquakes near Tehama County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
53 earthquakes have been recorded within 50 km since this one.
- 1.6 31km WSW of Hayfork, CA
- 1.8 20km SSE of Willow Creek, CA
- 2.1 25km WNW of Weaverville, CA
- 2.0 7km W of Willow Creek, CA
- 2.4 14km E of Willow Creek, CA
- 2.3 28km ENE of Willow Creek, CA
- 1.7 31km W of Hayfork, CA
- 2.1 26km ESE of Willow Creek, CA
- 1.9 11km NNE of Lewiston, CA
- 1.6 29km W of Hayfork, CA
- 2.1 22km E of Willow Creek, CA
- 2.6 6km NNW of Hayfork, CA
- 2.4 22km SE of Blue Lake, CA
- 2.0 10km NNW of Willow Creek, CA
- 2.1 30km WNW of Weaverville, 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.