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M1.8 earthquake near Tracyton, Washington, United States

A magnitude 1.8 earthquake struck near Tracyton, Washington, United States at 01:36 local time (08:36 UTC) on 6 Oct 2026, at a depth of 25 km, according to USGS.

revised from M2.1

Data: USGS · updated 2026-10-06 20:30 UTC · reviewed

Magnitude
1.8micro
local magnitude (Richter) (ml)
revised from 2.1
Depth
25.2 km
Status
Reviewed
Origin time
2026-10-06 08:36:29 UTC
Local: 6 Oct 2026, 01:36:29 (America/Los Angeles)
Epicentre
47.608° N, 122.623° W

Circles show this event and others within 30 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map

Nearby places

Distance and estimated shaking at nearby places
PlaceDistanceEst. shaking
TracytonWashington, United States · pop. 5,2333 kmINot felt
BremertonWashington, United States · pop. 39,5204 kmINot felt
Bainbridge IslandWashington, United States · pop. 23,8408 kmINot felt
SeattleWashington, United States · pop. 780,99522 kmINot felt
BurienWashington, United States · pop. 50,46726 kmINot felt
VictoriaBritish Columbia, Canada · pop. 289,625107 kmINot felt
SurreyBritish Columbia, Canada · pop. 568,322168 kmINot felt
VancouverBritish Columbia, Canada · pop. 662,248186 kmINot felt

Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more.

Every agency's solution

Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses USGS · UW, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · UWheadlinePacific Northwest Seismic Network via U.S. Geological Survey1.8 mlwas 2.125.2 km47.61° N, 122.62° W–Reviewed · 1 revision

How big was it?

Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.

It released roughly the energy of 9 kg of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 25 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.8 releases about 18× the energy of M1.0, and its waves are about 6.9× taller on a seismogram. Energy: 9 kg of TNT vs 477 g of TNT.

Each square is the energy of one M1.0. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

25 later earthquakes within 30 km; the largest was M2.0 38 days ago. 9 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.8

25 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
5.722.023
6.730.922
15.592.024
16.711.124
76.010.221
102.201.331
117.420.714
119.620.813
122.211.113
161.390.718
174.020.523
187.381.122
187.930.922
203.240.713
204.491.930
230.230.619
272.490.620
294.640.822
339.550.421
340.651.328
361.021.229
410.810.422
476.501.15
519.361.518
661.960.420
  1. 2.0Near Tracyton, Washington, United States10-07 00:11
  2. 2.0Near Tracyton, Washington, United States10-06 14:19
  3. 1.917 km WSW of East Port Orchard, Washington, United States10-14 21:06
  4. 1.513 km W of Port Orchard, Washington, United States10-27 23:58
  5. 1.37 km SE of Manchester, Washington, United States10-20 13:15
  6. 1.37 km ESE of Bainbridge Island, Washington, United States10-10 14:48
  7. 1.2Near Edmonds, Washington, United States10-21 09:37
  8. 1.17 km SW of Silverdale, Washington, United States10-11 10:48
  9. 1.17 km NNW of Bangor Trident Base, Washington, United States10-14 03:59
  10. 1.113 km W of Bangor Trident Base, Washington, United States10-26 05:06
  11. 1.13 km E of Tracyton, Washington, United States10-07 01:19
  12. 0.96 km NNW of Bangor Trident Base, Washington, United States10-14 04:32
  13. 0.94 km E of Tracyton, Washington, United States10-06 15:20
  14. 0.85 km WSW of Tracyton, Washington, United States10-11 08:13
  15. 0.811 km WNW of Edmonds, Washington, United States10-18 15:15
  16. 0.76 km WSW of Tracyton, Washington, United States10-11 06:01
  17. 0.74 km W of Tracyton, Washington, United States10-14 19:50
  18. 0.711 km WNW of Bangor Trident Base, Washington, United States10-13 01:59
  19. 0.64 km SSW of Bainbridge Island, Washington, United States10-15 22:50
  20. 0.611 km NW of Bangor Trident Base, Washington, United States10-17 17:05
  21. 0.514 km NW of Bangor Trident Base, Washington, United States10-13 14:37
  22. 0.415 km WNW of Bangor Trident Base, Washington, United States10-20 12:09
  23. 0.413 km NW of Bangor Trident Base, Washington, United States10-23 11:25
  24. 0.411 km WNW of Bangor Trident Base, Washington, United States11-02 22:34
  25. 0.213 km NNW of Bangor Trident Base, Washington, United States10-09 12:37

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

Reports close 14 days after an earthquake.

Reports on SeismoAtlas

No reports yet.

Event id uw714116711. First recorded here 6 Oct 2026, 08:40:54 UTC. Solutions: USGS · UW (usgs:uw714116711). Cite as: SeismoAtlas, “M1.8 earthquake near Tracyton, Washington, United States”, https://seismoatlas.com/earthquake/uw714116711-m1-8-earthquake-near-tracyton-washington-united-states, data from USGS.

JSON: /api/v1/events/uw714116711. SeismoAtlas is not an official warning service.