Earthquake · reviewed by a seismologist
M 2.6md
Earthquake near Weaverville, CA
No earthquake was likely felt in Weaverville in the 24 hours to 9:22 pm PST (05:22 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 2.6 earthquake was recorded 21 km (13 mi) northwest of Weaverville, CA, at 4:18 am PDT on 31 August 2019 (11:18 UTC), 42 km deep. 1 person has reported feeling it to USGS.
USGS: 21km NW of Weaverville, CA
- When
- 4:18 am PDT on 31 August 2019 ()
- Where
- 21 km (13 mi) northwest of Weaverville, CA · earthquakes near Weaverville
- Magnitude
- M 2.6 (md)
- Depth
- 42 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Trinity County, 24 km S
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2619 days ago
Earthquake alerts for Weaverville, CA
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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, 21 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 240 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.
- Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
- Magna, Utah 2020 M 5.7 45,000× the energy of this one
- Around the size people start to feel M 3.0 4× the energy of this one
- This earthquake M 2.6 about 240 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 · 45 km WSW of this epicentre
- 5.4 3 km NNW of Burnt Ranch, California · 32 km W 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 40.8648, -123.1145. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Trinity County, CA | 24 km (15 mi) | S | earthquakes near Trinity County |
| Humboldt County, CA | 71 km (44 mi) | WSW | earthquakes near Humboldt County |
| Shasta County, CA | 91 km (56 mi) | E | earthquakes near Shasta County |
| Siskiyou County, CA | 94 km (58 mi) | NNE | earthquakes near Siskiyou County |
| Tehama County, CA | 111 km (69 mi) | SE | earthquakes near Tehama County |
| Del Norte County, CA | 122 km (76 mi) | NW | earthquakes near Del Norte 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.
- 2.5 9km NNE of Hayfork, CA
- 2.2 9km ESE of Willow Creek, CA
- 2.4 21km SSE of Willow Creek, CA
- 2.5 16km SSE of Somes Bar, CA
- 2.5 8km E of Willow Creek, CA
- 2.0 18km ESE of Willow Creek, CA
- 2.3 20km ENE of Willow Creek, CA
- 2.3 18km E of Willow Creek, CA
- 2.4 12km SE of Weitchpec, CA
- 2.3 15km W of Weaverville, CA
- 2.4 32km W of Hayfork, CA
- 2.3 8km E of Willow Creek, CA
- 2.1 24km WNW of Weaverville, CA
- 2.2 20km SE of Willow Creek, CA
- 2.2 28km NW 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.