Earthquake · reviewed by a seismologist
M 2.1md
Earthquake near Mount Shasta, CA
No earthquake was likely felt in Mount Shasta in the 24 hours to 1:44 pm PST (21:44 UTC). The last one was M 1.9, 3 km (2 mi) WNW, at 4:20 pm PDT on 17 July 2026, estimated intensity II (weak) in town; 2 felt reports to USGS. Every earthquake near Mount Shasta
This page: a magnitude 2.1 earthquake was recorded 42 km (26 mi) east-northeast of Mount Shasta, CA, at 8:07 pm PST on 19 December 2025 (04:07 UTC), 6.8 km deep.
USGS: 13 km SSE of Tennant, CA
- When
- 8:07 pm PST on 19 December 2025 ()
- Where
- 42 km (26 mi) east-northeast of Mount Shasta, CA · earthquakes near Mount Shasta
- Magnitude
- M 2.1 (md)
- Depth
- 6.8 km below the surface
- Felt
- no reports yet
- Nearest
- Siskiyou County, 58 km WNW
- Nearest mapped fault
- Cedar Mountain fault system, 13 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 317 days ago
Earthquake alerts for Mount Shasta, CA
Get a notification in this browser when USGS records an earthquake near Mount Shasta, 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 minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 16 km (10 mi) from the epicentre. In Mount Shasta, 42 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 40 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.
- Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
- Magna, Utah 2020 M 5.7 270,000× the energy of this one
- Around the size people start to feel M 3.0 24× the energy of this one
- This earthquake M 2.1 about 40 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 since 1900 lists no earthquake of M5 or more within 50 km.
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 41.4773, -121.8567. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Siskiyou County, CA | 58 km (36 mi) | WNW | earthquakes near Siskiyou County |
| Shasta County, CA | 81 km (50 mi) | S | earthquakes near Shasta County |
| Modoc County, CA | 96 km (59 mi) | E | earthquakes near Modoc County |
| Jackson County, OR | 124 km (77 mi) | NNW | earthquakes near Jackson County |
| Lassen County, CA | 134 km (83 mi) | SE | earthquakes near Lassen County |
| Trinity County, CA | 140 km (87 mi) | SW | earthquakes near Trinity County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
11 earthquakes have been recorded within 50 km since this one.
- 2.0 13 km SSW of Tennant, CA
- 1.7 21 km NE of Big Bend, CA
- 1.8 14 km NNE of McCloud, CA
- 1.6 12 km N of McCloud, CA
- 2.1 13 km N of McCloud, CA
- 1.6 25 km NW of McArthur, CA
- 1.7 13 km NNE of McCloud, CA
- 1.9 3 km WNW of Mount Shasta, CA
- 1.8 31 km E of Tennant, CA
- 1.8 15 km NW of Big Bend, CA
- 1.9 24 km E of Tennant, 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.