Washington earthquakes

M1.5 earthquake 7 km W of Allyn, Washington

A magnitude 1.5 earthquake struck 7 km W of Allyn, Washington on Wed, Apr 17, 1991, 11:20 AM PDT (18:20 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M2.6 21 km W of Port Angeles, Washington. This one was a foreshock.

Allyn 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
1991-04-17 18:20:10 UTC
Depth
14.1 km (8.8 mi), shallow
Epicenter
47.398° N, 122.928° 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 0.5 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
55°
Stations used
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 2.47 km S of Longbranch, Washington · 12948 days ago · 22 km deep · 31 km away
  2. 1.514 km E of Wilkeson, Washington · 12939 days ago · 7 km deep · 88 km away
  3. 1.614 km E of Wilkeson, Washington · 12939 days ago · 7 km deep · 87 km away
  4. 2.01 km SSE of Normandy Park, WA · 12938 days ago · 13 km deep · 45 km away
  5. 1.52 km SE of Lake Roesiger, Washington · 12937 days ago · 17 km deep · 99 km away
  6. 2.621 km W of Port Angeles, Washington · 12920 days ago · 5 km deep · 98 km away
  7. 1.75 km ESE of Carbonado, Washington · 12917 days ago · 10 km deep · 80 km away
  8. 2.08 km NE of Snoqualmie, Washington · 12917 days ago · 1 km deep · 91 km away
  9. 1.87 km NE of Fall City, Washington · 12910 days ago · 2 km deep · 87 km away
  10. 2.33 km SW of McCleary, Washington · 12909 days ago · 39 km deep · 50 km away
  11. 1.74 km ENE of Port Ludlow, Washington · 12909 days ago · 14 km deep · 64 km away
  12. 2.26 km ENE of Amanda Park, Washington · 12907 days ago · 33 km deep · 68 km away
  13. 1.74 km WNW of Hunts Point, Washington · 12904 days ago · 52 km deep · 56 km away
  14. 1.64 km ENE of Lake Morton-Berrydale, Washington · 12895 days ago · 14 km deep · 66 km away

Before

  1. 2.32 km SSW of West Lake Sammamish, Washington · 12960 days ago · 12 km deep · 64 km away
  2. 2.013 km SSW of Alder, Washington · 12962 days ago · 16 km deep · 90 km away
  3. 2.05 km SSW of Clinton, Washington · 12967 days ago · 23 km deep · 72 km away
  4. 1.62 km SW of Roosevelt, Washington · 12971 days ago · 16 km deep · 85 km away
  5. 2.78 km WSW of Amanda Park, Washington · 12971 days ago · 25 km deep · 81 km away
  6. 1.82 km NW of Warm Beach, Washington · 12977 days ago · 0 km deep · 97 km away
  7. 1.922 km W of Port Angeles, Washington · 12978 days ago · 6 km deep · 97 km away
  8. 2.62 km W of Maple Valley, Washington · 12980 days ago · 5 km deep · 64 km away
  9. 1.91 km WNW of Maple Valley, Washington · 12982 days ago · 7 km deep · 64 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10273768. Read Sun, Oct 4, 2026, 10:12 PM UTC.