Washington earthquakes

M1.8 earthquake 51 km SE of Marblemount, Washington

A magnitude 1.8 earthquake struck 51 km SE of Marblemount, Washington on Thu, Aug 14, 1986, 2:50 PM PDT (21:50 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M1.9 17 km E of Verlot, Washington. This one was a foreshock.

Darrington forecastMore in Washington

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
1986-08-14 21:50:16 UTC
Depth
-0.9 km (-0.6 mi), shallow
Epicenter
48.242° N, 120.904° 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 0.4 km horizontally, 2.3 km in depth
Magnitude uncertainty
±0.08
Depth from
Operator assigned
Station coverage gap
159°
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 1.81 km S of Hamilton, Washington · 14644 days ago · -1 km deep · 85 km away
  2. 1.521 km WSW of Granite Falls, Washington · 14638 days ago · 0 km deep · 54 km away
  3. 1.917 km E of Verlot, Washington · 14637 days ago · 7 km deep · 52 km away
  4. 1.817 km NNW of Winthrop, Washington · 14633 days ago · -1 km deep · 63 km away
  5. 1.8Washington · 14631 days ago · -1 km deep · 52 km away
  6. 1.514 km ESE of Verlot, Washington · 14631 days ago · 9 km deep · 54 km away
  7. 2.317 km E of Verlot, Washington · 14630 days ago · 6 km deep · 51 km away
  8. 1.64 km SW of Darrington, Washington · 14616 days ago · 1 km deep · 55 km away
  9. 2.820 km E of Verlot, Washington · 14616 days ago · 5 km deep · 49 km away
  10. 2.417 km ESE of Verlot, Washington · 14616 days ago · 7 km deep · 52 km away
  11. 2.43 km N of Hamilton, Washington · 14606 days ago · -1 km deep · 87 km away
  12. 2.23 km N of Hamilton, Washington · 14603 days ago · -1 km deep · 87 km away
  13. 2.215 km ESE of Acme, Washington · 14600 days ago · -1 km deep · 95 km away
  14. 1.514 km NNE of Snoqualmie Pass, Washington · 14595 days ago · 5 km deep · 87 km away
  15. 2.320 km SSE of Marblemount, Washington · 14593 days ago · 9 km deep · 36 km away

Before

  1. 2.025 km NNW of Leavenworth, Washington · 14652 days ago · 0 km deep · 50 km away
  2. 1.63 km WSW of Lake Marcel-Stillwater, Washington · 14655 days ago · 18 km deep · 100 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10211078. Read Tue, Sep 22, 2026, 10:30 PM UTC.