Washington earthquakes

M1.8 earthquake Washington

A magnitude 1.8 earthquake struck in Washington on Mon, Sep 1, 1986, 3:55 PM PDT (22:55 UTC), -1 km (0 mi) below the surface.

A larger quake followed: M2.3 17 km E of Verlot, Washington. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.8 (md), micro
Local time
UTC
1986-09-01 22:55:07 UTC
Depth
-0.7 km (-0.5 mi), shallow
Epicenter
48.044° N, 121.537° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.1 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.06
Depth from
Operator assigned
Station coverage gap
202°, poorly surrounded by stations
Stations used
8

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 1.514 km ESE of Verlot, Washington · 14631 days ago · 9 km deep · 4 km away
  2. 2.317 km E of Verlot, Washington · 14630 days ago · 6 km deep · 2 km away
  3. 1.60 km S of Oak Harbor, Washington · 14628 days ago · 19 km deep · 86 km away
  4. 2.3Puget Sound region, Washington · 14626 days ago · 13 km deep · 59 km away
  5. 1.64 km SW of Darrington, Washington · 14616 days ago · 1 km deep · 21 km away
  6. 2.820 km E of Verlot, Washington · 14616 days ago · 5 km deep · 3 km away
  7. 2.417 km ESE of Verlot, Washington · 14616 days ago · 7 km deep · 2 km away
  8. 2.43 km N of Hamilton, Washington · 14606 days ago · -1 km deep · 66 km away
  9. 2.23 km N of Hamilton, Washington · 14603 days ago · -1 km deep · 65 km away
  10. 1.81 km NNE of Riverton, Washington · 14603 days ago · 25 km deep · 83 km away
  11. 1.72 km E of Kirkland, Washington · 14601 days ago · 14 km deep · 62 km away
  12. 2.215 km ESE of Acme, Washington · 14600 days ago · -1 km deep · 79 km away
  13. 1.514 km NNE of Snoqualmie Pass, Washington · 14595 days ago · 5 km deep · 61 km away
  14. 2.320 km SSE of Marblemount, Washington · 14593 days ago · 9 km deep · 37 km away
  15. 1.85 km ENE of Southworth, Washington · 14575 days ago · 14 km deep · 88 km away
  16. 1.617 km ESE of Verlot, Washington · 14574 days ago · 7 km deep · 2 km away

Before

  1. 1.73 km SSE of Klahanie, Washington · 14633 days ago · 19 km deep · 65 km away
  2. 2.11 km N of Bothell West, Washington · 14637 days ago · 20 km deep · 58 km away
  3. 1.917 km E of Verlot, Washington · 14637 days ago · 7 km deep · 2 km away
  4. 1.521 km WSW of Granite Falls, Washington · 14638 days ago · 0 km deep · 81 km away
  5. 1.81 km S of Hamilton, Washington · 14645 days ago · -1 km deep · 61 km away
  6. 1.851 km SE of Marblemount, Washington · 14649 days ago · -1 km deep · 52 km away
  7. 2.025 km NNW of Leavenworth, Washington · 14652 days ago · 0 km deep · 60 km away
  8. 1.63 km WSW of Lake Marcel-Stillwater, Washington · 14655 days ago · 18 km deep · 51 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10209733. Read Wed, Sep 23, 2026, 1:49 AM UTC.