Washington earthquakes

M1.5 earthquake 38 km WSW of Twisp, Washington

A magnitude 1.5 earthquake struck 38 km WSW of Twisp, Washington on Tue, Aug 11, 1992, 5:56 PM PDT (00:56 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M2.6 6 km W of Entiat, Washington. This one was a foreshock.

Twisp 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
1.5 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1992-08-12 00:56:10 UTC
Depth
8.9 km (5.5 mi), shallow
Epicenter
48.255° N, 120.609° 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 2.3 km horizontally
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
174°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 2.66 km W of Entiat, Washington · 12469 days ago · -1 km deep · 69 km away
  2. 1.719 km ESE of Darrington, Washington · 12464 days ago · 5 km deep · 56 km away
  3. 1.626 km N of Leavenworth, Washington · 12463 days ago · 2 km deep · 48 km away
  4. 1.739 km NE of Skykomish, Washington · 12460 days ago · 0 km deep · 45 km away
  5. 1.74 km NW of Entiat, Washington · 12456 days ago · 0 km deep · 67 km away
  6. 1.95 km WSW of Darrington, Washington · 12446 days ago · 8 km deep · 79 km away
  7. 2.35 km WSW of Darrington, Washington · 12446 days ago · 1 km deep · 79 km away
  8. 1.65 km NNE of Waterville, Washington · 12437 days ago · 5 km deep · 76 km away
  9. 1.68 km SSW of May Creek, Washington · 12430 days ago · 4 km deep · 96 km away
  10. 1.911 km W of Entiat, Washington · 12430 days ago · 6 km deep · 67 km away
  11. 1.74 km W of Swede Heaven, WA · 12418 days ago · 8 km deep · 87 km away
  12. 1.527 km ESE of Glacier, Washington · 12416 days ago · 1 km deep · 96 km away

Before

  1. 1.95 km WSW of Darrington, Washington · 12501 days ago · 2 km deep · 78 km away
  2. 2.05 km WSW of Darrington, Washington · 12502 days ago · 2 km deep · 78 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10294913. Read Mon, Oct 5, 2026, 12:12 AM UTC.