Earthquake · reviewed by a seismologist
M 2.5ml
4 km ENE of Oak Bay, Canada
Yes. A magnitude 2.5 earthquake was recorded 4 km ENE of Oak Bay, Canada, at 3:48 pm PDT on 26 March 2025 (22:48 UTC), 46 km deep. 7 people have reported feeling it to USGS.
- When
- Magnitude
- M 2.5 (ml)
- Depth
- 46 km below the surface
- Felt
- 7 reports · strongest reported intensity II
- Nearest
- San Juan County, 11 km ENE
- Nearest mapped fault
- Utsalady Point fault, 10 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 525 days ago
Earthquake alerts for Friday Harbor, WA
Get a notification in this browser when USGS records an earthquake near Friday Harbor, WA. 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. 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.
Earthquakes near other towns within 30 km: Friday Harbor.
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
The largest earthquake within 50 km in our catalogue was M 4.5 on 2025-03-03 — about 930 times the energy of this one.
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 48.4725, -123.2490. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Juan County, WA | 11 km (7 mi) | ENE | earthquakes near San Juan County |
| Island County, WA | 55 km (34 mi) | SE | earthquakes near Island County |
| Clallam County, WA | 62 km (39 mi) | SW | earthquakes near Clallam County |
| Jefferson County, WA | 77 km (48 mi) | SSW | earthquakes near Jefferson County |
| Kitsap County, WA | 103 km (64 mi) | SSE | earthquakes near Kitsap County |
| Skagit County, WA | 106 km (66 mi) | E | earthquakes near Skagit County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
55 earthquakes have been recorded within 50 km since this one.
- 0.9 7 km W of Orcas, Washington
- 1.3 4 km NNW of Victoria, Canada
- 1.2 11 km SW of Friday Harbor, Washington
- 1.4 8 km SW of Port Angeles, Washington
- 1.8 2 km S of Colwood, Canada
- 0.7 3 km N of North Saanich, Canada
- 1.2 9 km NW of Friday Harbor, Washington
- 1.1 6 km W of Orcas, Washington
- 1.1 6 km W of Orcas, Washington
- 1.4 10 km WSW of Anacortes, Washington
- 1.5 3 km N of Langford, Canada
- 0.9 2 km ENE of Six Mile, Canada
- 0.5 11 km E of Orcas, Washington
- 0.4 6 km ENE of Oak Bay, Canada
- 1.2 7 km N of Six Mile, 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.