Earthquake · reviewed by a seismologist
M 3.7ml
Earthquake near Seattle, WA
No earthquake was likely felt in Seattle in the 24 hours to 6:36 am PST (14:36 UTC). The last one was M 4.2, 37 km (23 mi) SW, at 2:05 pm PDT on 29 September 2026, estimated intensity III (weak) in town; 9,329 felt reports to USGS. Every earthquake near Seattle
This page: a magnitude 3.7 earthquake was recorded 49 km (31 mi) west-northwest of Seattle, WA, at 8:55 pm PDT on 15 June 2017 (03:55 UTC), 55 km deep. 163 people have reported feeling it to USGS.
USGS: 2 km NNW of Quilcene, Washington
47 km (29 mi) WNW of Seattle, WA · 42 km (26 mi) WNW of Shoreline, WA
- When
- 8:55 pm PDT on 15 June 2017 ()
- Where
- 49 km (31 mi) west-northwest of Seattle, WA · earthquakes near Seattle
- Magnitude
- M 3.7 (ml)
- Depth
- 55 km below the surface
- Felt
- 163 reports · strongest reported intensity IV
- Measured shaking
- intensity III (ShakeMap)
- Nearest
- Kitsap County, 29 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 601 days ago
Earthquake alerts for Seattle, 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 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 52 km (32 mi) from the epicentre. In Seattle, 49 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.
Likely felt in: Poulsbo 22 km, intensity II · Silverdale 26 km, intensity II · Sequim 31 km, intensity II · Port Townsend 32 km, intensity II · Enetai 36 km, intensity II · Bremerton 36 km, intensity II · Edmonds 38 km, intensity II · Shoreline 42 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 32,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
- Magna, Utah 2020 M 5.7 1,000× the energy of this one
- This earthquake M 3.7 about 5.4 tons of TNT
- Around the size people start to feel M 3.0 this one released 11× 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 4.1 on 2017-02-23 — about 3.8 times the energy of this one.
Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:
- 6.1 Puget Sound region, Washington · 50 km SSE of this epicentre
- 5.3 Eastern Olympic Peninsula, Washington · 9 km WSW 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 47.8385, -122.8907. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kitsap County, WA | 29 km (18 mi) | SE | earthquakes near Kitsap County |
| Island County, WA | 39 km (24 mi) | NNE | earthquakes near Island County |
| Jefferson County, WA | 48 km (30 mi) | W | earthquakes near Jefferson County |
| Mason County, WA | 58 km (36 mi) | SSW | earthquakes near Mason County |
| San Juan County, WA | 76 km (47 mi) | NNW | earthquakes near San Juan County |
| Clallam County, WA | 80 km (50 mi) | WNW | earthquakes near Clallam County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 1.9 7 km SSW of Clinton, Washington
- 1.9 5 km NW of Freeland, Washington
- 1.7 3 km SSW of Erlands Point-Kitsap Lake, Washington
- 1.6 2 km WNW of Navy Yard City, Washington
- 1.6 2 km WNW of Navy Yard City, Washington
- 1.9 1 km NE of Suquamish, Washington
- 1.6 2 km E of Enetai, Washington
- 2.7 5 km W of Gorst, Washington
- 1.5 3 km ENE of Enetai, Washington
- 1.6 2 km W of Coupeville, Washington
- 1.9 0 km SSE of Enetai, Washington
- 1.6 3 km NW of Burley, Washington
- 1.6 19 km WSW of Brinnon, Washington
- 1.5 3 km SSE of Quilcene, Washington
- 1.7 5 km ESE of Camano, 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.