M1.1 earthquake 7 km SW of Silverdale, Washington, United States
A magnitude 1.1 earthquake struck 7 km SW of Silverdale, Washington, United States at 03:48 local time (10:48 UTC) on 11 Oct 2026, at a depth of 13 km, according to USGS.
Data: USGS · updated 2026-10-12 22:40 UTC · reviewed
- Magnitude
- 1.1micro
local magnitude (Richter) (ml) - Depth
- 13.3 km
- Status
- Reviewed
- Origin time
- 2026-10-11 10:48:55 UTC
- Local: 11 Oct 2026, 03:48:55 (America/Los Angeles)
- Epicentre
- 47.598° N, 122.760° 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
| Place | Distance | Est. shaking |
|---|---|---|
| SilverdaleWashington, United States · pop. 19,204 | 7 km | INot felt |
| TracytonWashington, United States · pop. 5,233 | 8 km | INot felt |
| BremertonWashington, United States · pop. 39,520 | 10 km | INot felt |
| Bainbridge IslandWashington, United States · pop. 23,840 | 18 km | INot felt |
| SeattleWashington, United States · pop. 780,995 | 32 km | INot felt |
| BurienWashington, United States · pop. 50,467 | 34 km | INot felt |
| VictoriaBritish Columbia, Canada · pop. 289,625 | 103 km | INot felt |
| SurreyBritish Columbia, Canada · pop. 568,322 | 168 km | INot 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.
| Agency | Magnitude | Depth | Epicentre | Time offset | Status |
|---|---|---|---|---|---|
| USGS · UWheadlinePacific Northwest Seismic Network via U.S. Geological Survey | 1.1 ml | 13.3 km | 47.60° N, 122.76° W | – | Reviewed |
How big was it?
Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.
It released roughly the energy of 747 g 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 13 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.
M1.1 releases about 1.6× the energy of M1.0, and its waves are about 1.3× taller on a seismogram. Energy: 747 g 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
20 later earthquakes within 30 km; the largest was M1.9 30 days ago. 10 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.
Mainshock M1.1
20 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).
| Time after mainshock (hours) | Magnitude | Depth (km) |
|---|---|---|
| 39.18 | 0.7 | 18 |
| 51.81 | 0.5 | 23 |
| 65.17 | 1.1 | 22 |
| 65.72 | 0.9 | 22 |
| 81.03 | 0.7 | 13 |
| 82.29 | 1.9 | 30 |
| 108.02 | 0.6 | 19 |
| 150.28 | 0.6 | 20 |
| 217.35 | 0.4 | 21 |
| 218.44 | 1.3 | 28 |
| 288.60 | 0.4 | 22 |
| 354.29 | 1.1 | 5 |
| 393.12 | 0.4 | -1 |
| 397.16 | 1.5 | 18 |
| 539.76 | 0.4 | 20 |
| 599.36 | 0.9 | 21 |
| 621.85 | 0.9 | 23 |
| 660.73 | 1.3 | 18 |
| 700.12 | -0.3 | 11 |
| 700.96 | 0.5 | 22 |
- 1.917 km WSW of East Port Orchard, Washington, United States10-14 21:06
- 1.513 km W of Port Orchard, Washington, United States10-27 23:58
- 1.37 km SE of Manchester, Washington, United States10-20 13:15
- 1.38 km WSW of Tracyton, Washington, United States11-07 23:32
- 1.17 km NNW of Bangor Trident Base, Washington, United States10-14 03:59
- 1.113 km W of Bangor Trident Base, Washington, United States10-26 05:06
- 0.96 km NNW of Bangor Trident Base, Washington, United States10-14 04:32
- 0.9Near Tracyton, Washington, United States11-06 08:39
- 0.912 km NW of Bangor Trident Base, Washington, United States11-05 10:10
- 0.74 km W of Tracyton, Washington, United States10-14 19:50
- 0.711 km WNW of Bangor Trident Base, Washington, United States10-13 01:59
- 0.64 km SSW of Bainbridge Island, Washington, United States10-15 22:50
- 0.611 km NW of Bangor Trident Base, Washington, United States10-17 17:05
- 0.511 km W of Port Orchard, Washington, United States11-09 15:46
- 0.514 km NW of Bangor Trident Base, Washington, United States10-13 14:37
- 0.415 km WNW of Bangor Trident Base, Washington, United States10-20 12:09
- 0.413 km NW of Bangor Trident Base, Washington, United States10-23 11:25
- 0.411 km WNW of Bangor Trident Base, Washington, United States11-02 22:34
- 0.424 km NNE of Shelton, Washington, United States10-27 19:56
- -0.320 km W of Port Orchard, Washington, United States11-09 14:56
Did you feel it?
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Reports close 14 days after an earthquake.
Reports on SeismoAtlas
No reports yet.
Event id uw714118322. First recorded here 12 Oct 2026, 23:26:49 UTC. Solutions: USGS · UW (usgs:uw714118322). Cite as: SeismoAtlas, “M1.1 earthquake 7 km SW of Silverdale, Washington, United States”, https://seismoatlas.com/earthquake/uw714118322-m1-1-earthquake-7-km-sw-of-silverdale-washington-united-states, data from USGS.
JSON: /api/v1/events/uw714118322. SeismoAtlas is not an official warning service.