Earthquake · reviewed by a seismologist
M 2.1ml
8 km SW of Duncan, Canada
Yes. A magnitude 2.1 earthquake was recorded 8 km SW of Duncan, Canada, at 7:18 am PDT on 20 August 2025 (14:18 UTC), 22 km deep. 1 person has reported feeling it to USGS.
- When
- Magnitude
- M 2.1 (ml)
- Depth
- 22 km below the surface
- Felt
- 1 report · strongest reported intensity I
- Nearest
- San Juan County, 56 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 434 days ago
Earthquake alerts for Point Roberts, WA
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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 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. 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 41 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 5.8 370,000× the energy of this one
- Magna, Utah 2020 M 5.7 260,000× the energy of this one
- Around the size people start to feel M 3.0 23× the energy of this one
- This earthquake M 2.1 about 41 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.
Where
Epicentre 48.7315, -123.7905. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Juan County, WA | 56 km (35 mi) | ESE | earthquakes near San Juan County |
| Clallam County, WA | 69 km (43 mi) | S | earthquakes near Clallam County |
| Island County, WA | 104 km (65 mi) | SE | earthquakes near Island County |
| Jefferson County, WA | 105 km (65 mi) | S | earthquakes near Jefferson County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
16 earthquakes have been recorded within 50 km since this one.
- 1.3 4 km NNW of Victoria, Canada
- 1.8 2 km S of Colwood, Canada
- 0.7 3 km N of North Saanich, Canada
- 1.5 3 km N of Langford, Canada
- 0.9 2 km ENE of Six Mile, Canada
- 1.2 7 km N of Six Mile, Canada
- 1.8 3 km WNW of Ladysmith, Canada
- 1.7 14 km SW of Cowichan Bay, Canada
- 1.9 10 km S of Cowichan Bay, Canada
- 1.9 10 km ESE of Salt Spring Island, Canada
- 1.6 3 km N of Langford, Canada
- 1.6 10 km NW of Ganges, Canada
- 2.3 5 km SSE of Esquimalt, Canada
- 2.7 10 km SE of Salt Spring Island, Canada
- 1.7 6 km SW of Saanichton, Canada
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.