Earthquake · reviewed by a seismologist
M 3.8ml
Earthquake near Oak Harbor, WA
No earthquake was likely felt in Oak Harbor in the 24 hours to 5:28 am PST (13:28 UTC). The last one was M 4.2, 99 km (62 mi) S, at 2:05 pm PDT on 29 September 2026, estimated intensity II (weak) in town; 9,329 felt reports to USGS. Every earthquake near Oak Harbor
This page: a magnitude 3.8 earthquake was recorded 3 km (2 mi) east of Oak Harbor, WA, at 11:35 pm PDT on 1 July 2026 (06:35 UTC), 25 km deep. 2,030 people have reported feeling it to USGS.
USGS: 2 km E of Oak Harbor, Washington
77 km (48 mi) NNW of Seattle, WA · 41 km (25 mi) NW of Marysville, WA
- When
- 11:35 pm PDT on 1 July 2026 ()
- Where
- 3 km (2 mi) east of Oak Harbor, WA · earthquakes near Oak Harbor
- Magnitude
- M 3.8 (ml)
- Depth
- 25 km below the surface
- Felt
- 2,030 reports · strongest reported intensity IV
- Measured shaking
- intensity III (ShakeMap)
- Nearest
- Island County, 15 km SSW
- Nearest mapped fault
- Utsalady Point fault, under 1 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 54 days ago
Earthquake alerts for Oak Harbor, WA
Get a notification in this browser when USGS records an earthquake near Oak 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, people at rest would likely notice it out to about 79 km (49 mi) from the epicentre. In Oak Harbor, 3 km away, the estimate is intensity III (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.
Likely felt in: Oak Harbor 3 km, intensity III · Coupeville 10 km, intensity III · Camano 14 km, intensity III · Port Townsend 22 km, intensity III · Anacortes 25 km, intensity III · Mount Vernon 25 km, intensity III · Sedro-Woolley 36 km, intensity II · Arlington 37 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 7.6 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 22,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 1,000× the energy of this one
- Magna, Utah 2020 M 5.7 710× the energy of this one
- This earthquake M 3.8 about 7.6 tons of TNT
- Around the size people start to feel M 3.0 this one released 16× more
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 since 2016 was M 4.5 on 2025-03-03 — about 11 times the energy of this one.
Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:
- 6.0 San Juan Islands, Washington · 48 km NNW of this epicentre
- 5.0 6 km W of Conway, Washington · 14 km ENE 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 48.2888, -122.6065. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Island County, WA | 15 km (9 mi) | SSW | earthquakes near Island County |
| San Juan County, WA | 44 km (27 mi) | WNW | earthquakes near San Juan County |
| Skagit County, WA | 63 km (39 mi) | ENE | earthquakes near Skagit County |
| Snohomish County, WA | 68 km (42 mi) | ESE | earthquakes near Snohomish County |
| Kitsap County, WA | 72 km (45 mi) | S | earthquakes near Kitsap County |
| Whatcom County, WA | 84 km (52 mi) | NE | earthquakes near Whatcom County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
36 earthquakes have been recorded within 50 km since this one.
- 0.9 7 km W of Orcas, Washington
- 0.7 10 km S of Acme, Washington
- 1.1 8 km NNE of Quilcene, Washington
- 1.2 11 km SW of Friday Harbor, Washington
- 1.3 5 km WSW of Port Ludlow, Washington
- 0.8 4 km ENE of Oak Harbor, Washington
- 1.3 4 km S of Port Ludlow, Washington
- 1.4 2 km W of Mukilteo, Washington
- 1.4 8 km SW of Camano, Washington
- 0.8 6 km SSE of Hansville, Washington
- 0.4 7 km NE of Sedro-Woolley, 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
- 0.9 2 km WNW of Lyman, Washington
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.