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M1.6 earthquake 22 km ENE of West Side Highway, Washington, United States

A magnitude 1.6 earthquake struck 22 km ENE of West Side Highway, Washington, United States at 13:15 local time (20:15 UTC) on 7 Oct 2026, at a depth of 17 km, according to USGS.

revised from M1.7

Data: USGS · updated 2026-10-08 17:40 UTC · reviewed

Magnitude
1.6micro
local magnitude (Richter) (ml)
revised from 1.7
Depth
17.4 km
Status
Reviewed
Origin time
2026-10-07 20:15:59 UTC
Local: 7 Oct 2026, 13:15:59 (America/Los Angeles)
Epicentre
46.247° N, 122.644° 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
West Side HighwayWashington, United States · pop. 5,51722 kmINot felt
KelsoWashington, United States · pop. 11,90123 kmINot felt
LongviewWashington, United States · pop. 36,84826 kmINot felt
VancouverWashington, United States · pop. 196,44267 kmINot felt
CamasWashington, United States · pop. 21,84675 kmINot felt
BethanyOregon, United States · pop. 20,64678 kmINot felt
PortlandOregon, United States · pop. 652,50381 kmINot felt
SeattleWashington, United States · pop. 780,995153 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 Survey1.6 mlwas 1.617.4 km46.25° N, 122.64° W–Reviewed · 2 revisions

How big was it?

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

It released roughly the energy of 3 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 17 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M1.6 releases about 7.2× the energy of M1.0, and its waves are about 3.7× taller on a seismogram. Energy: 3 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

17 later earthquakes within 30 km; the largest was M1.6 35 days ago. 5 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M1.6

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

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
1.570.617
27.271.60
36.860.312
36.87-0.112
42.730.312
72.680.011
120.690.215
132.180.117
146.070.39
195.571.10
346.670.518
468.640.618
468.660.317
529.671.40
585.141.118
675.040.717
698.321.10
  1. 1.620 km NNE of West Side Highway, Washington, United States10-08 23:32
  2. 1.420 km NNE of West Side Highway, Washington, United States10-29 21:55
  3. 1.121 km NNE of West Side Highway, Washington, United States10-15 23:50
  4. 1.122 km ENE of West Side Highway, Washington, United States11-01 05:24
  5. 1.120 km NNE of West Side Highway, Washington, United States11-05 22:35
  6. 0.723 km ENE of West Side Highway, Washington, United States11-04 23:18
  7. 0.651 km ENE of West Side Highway, Washington, United States10-07 21:50
  8. 0.622 km ENE of West Side Highway, Washington, United States10-27 08:54
  9. 0.522 km ENE of West Side Highway, Washington, United States10-22 06:56
  10. 0.347 km E of Kelso, Washington, United States10-09 09:07
  11. 0.347 km E of Kelso, Washington, United States10-09 15:00
  12. 0.342 km E of Kelso, Washington, United States10-13 22:19
  13. 0.323 km ENE of West Side Highway, Washington, United States10-27 08:55
  14. 0.245 km E of Kelso, Washington, United States10-12 20:57
  15. 0.123 km ENE of West Side Highway, Washington, United States10-13 08:26
  16. 0.047 km E of Kelso, Washington, United States10-10 20:57
  17. -0.147 km E of Kelso, Washington, United States10-09 09:07

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 uw714117561. First recorded here 7 Oct 2026, 20:19:15 UTC. Solutions: USGS · UW (usgs:uw714117561). Cite as: SeismoAtlas, “M1.6 earthquake 22 km ENE of West Side Highway, Washington, United States”, https://seismoatlas.com/earthquake/uw714117561-m1-6-earthquake-22-km-ene-of-west-side-highway-washington-united-states, data from USGS.

JSON: /api/v1/events/uw714117561. SeismoAtlas is not an official warning service.