Earthquake · reviewed by a seismologist
M 1.9md
Earthquake near Dunsmuir, CA
No earthquake was likely felt in Dunsmuir in the 24 hours to 5:31 am PST (13:31 UTC). The last one was M 1.9, 7 km (5 mi) SSW, at 5:17 pm PDT on 19 October 2026, estimated intensity II (weak) in town. Every earthquake near Dunsmuir
This page: a magnitude 1.9 earthquake was recorded 21 km (13 mi) south-southwest of Dunsmuir, CA, at 12:01 pm PDT on 28 August 2018 (19:01 UTC), 6.5 km deep.
USGS: 21km SSW of Dunsmuir, CA
51 km (32 mi) N of Redding, CA · 148 km (92 mi) NNW of Chico, CA
- When
- 12:01 pm PDT on 28 August 2018 ()
- Where
- 21 km (13 mi) south-southwest of Dunsmuir, CA · earthquakes near Dunsmuir
- Magnitude
- M 1.9 (md)
- Depth
- 6.5 km below the surface
- Felt
- no reports yet
- Nearest
- Shasta County, 39 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3001 days ago
Earthquake alerts for Dunsmuir, CA
Get a notification in this browser when USGS records an earthquake near Dunsmuir, 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 13 km (8 mi) from the epicentre. In Dunsmuir, 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 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 790,000× the energy of this one
- Magna, Utah 2020 M 5.7 560,000× the energy of this one
- Around the size people start to feel M 3.0 50× the energy of this one
- This earthquake M 1.9 about 19 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 one earthquake of M5 or more within 50 km:
- 5.1 7km NW of Redding, CA · 45 km S 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 41.0307, -122.3468. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Shasta County, CA | 39 km (24 mi) | SE | earthquakes near Shasta County |
| Siskiyou County, CA | 64 km (40 mi) | NNW | earthquakes near Siskiyou County |
| Trinity County, CA | 77 km (48 mi) | WSW | earthquakes near Trinity County |
| Tehama County, CA | 101 km (63 mi) | S | earthquakes near Tehama County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
49 earthquakes have been recorded within 50 km since this one.
- 1.8 17km NNE of Bella Vista, CA
- 1.6 16km N of McCloud, CA
- 1.6 26km NNE of Shasta Lake, CA
- 1.5 9km NE of Shasta Lake, CA
- 1.8 6km NNE of Millville, CA
- 1.9 11km ENE of French Gulch, CA
- 1.6 5km NNE of Shasta, CA
- 2.1 20km WSW of Mount Shasta, CA
- 1.6 8km NE of Shasta Lake, CA
- 1.6 4km WNW of Big Bend, CA
- 1.7 9km NE of Shasta Lake, CA
- 1.8 5km SW of Big Bend, CA
- 1.6 6km ENE of McCloud, CA
- 1.9 11km ENE of French Gulch, CA
- 1.6 9km NE of Shasta Lake, 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.