Washington earthquakes

M1.5 earthquake 20 km NNW of Packwood, Washington

A magnitude 1.5 earthquake struck 20 km NNW of Packwood, Washington on Tue, Apr 9, 1991, 7:19 PM PDT (02:19 UTC), -1 km (0 mi) below the surface.

A larger quake followed: M3.0 10 km E of Ashford, 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
1.5 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1991-04-10 02:19:56 UTC
Depth
-0.8 km (-0.5 mi), shallow
Epicenter
46.783° N, 121.735° 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 4.7 km horizontally
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
298°, poorly surrounded by stations
Stations used
3

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 22 in the 30 days before it.

After

  1. 2.32 km SSW of West Lake Sammamish, Washington · 12958 days ago · 12 km deep · 90 km away
  2. 1.633 km ESE of Packwood, Washington · 12949 days ago · -1 km deep · 50 km away
  3. 2.47 km S of Longbranch, Washington · 12945 days ago · 22 km deep · 88 km away
  4. 1.937 km NNE of Amboy, Washington · 12944 days ago · -2 km deep · 74 km away
  5. 1.514 km E of Wilkeson, Washington · 12937 days ago · 7 km deep · 36 km away
  6. 1.614 km E of Wilkeson, Washington · 12937 days ago · 7 km deep · 36 km away
  7. 2.01 km SSE of Normandy Park, WA · 12935 days ago · 13 km deep · 85 km away
  8. 1.638 km NNE of Amboy, Washington · 12931 days ago · -1 km deep · 73 km away
  9. 2.123 km NE of Ashford, Washington · 12929 days ago · -1 km deep · 14 km away
  10. 1.637 km NNE of Amboy, Washington · 12923 days ago · 3 km deep · 74 km away
  11. 3.010 km E of Ashford, Washington · 12923 days ago · 10 km deep · 12 km away
  12. 1.75 km ESE of Carbonado, Washington · 12914 days ago · 10 km deep · 37 km away
  13. 2.238 km SSE of Morton, WA · 12914 days ago · 11 km deep · 64 km away
  14. 1.737 km NNE of Amboy, Washington · 12914 days ago · -2 km deep · 74 km away
  15. 1.637 km NNE of Amboy, Washington · 12914 days ago · -2 km deep · 73 km away
  16. 2.08 km NE of Snoqualmie, Washington · 12914 days ago · 1 km deep · 88 km away
  17. 1.628 km SW of White Swan, Washington · 12910 days ago · -1 km deep · 87 km away
  18. 1.87 km NE of Fall City, Washington · 12907 days ago · 2 km deep · 92 km away
  19. 1.637 km NNE of Amboy, Washington · 12900 days ago · -2 km deep · 74 km away

Before

  1. 2.013 km SSW of Alder, Washington · 12960 days ago · 16 km deep · 48 km away
  2. 1.522 km ENE of Ashford, Washington · 12964 days ago · -1 km deep · 7 km away
  3. 1.922 km ENE of Ashford, Washington · 12969 days ago · -2 km deep · 8 km away
  4. 1.722 km ENE of Ashford, Washington · 12969 days ago · -2 km deep · 7 km away
  5. 2.324 km S of Morton, Washington · 12970 days ago · 11 km deep · 63 km away
  6. 1.719 km S of Morton, Washington · 12976 days ago · 6 km deep · 62 km away
  7. 2.62 km W of Maple Valley, Washington · 12977 days ago · 5 km deep · 73 km away
  8. 2.121 km SW of Easton, Washington · 12978 days ago · -1 km deep · 44 km away
  9. 1.636 km NNE of Amboy, Washington · 12978 days ago · -1 km deep · 74 km away
  10. 2.438 km NNE of Amboy, Washington · 12978 days ago · -1 km deep · 73 km away
  11. 1.835 km NNE of Amboy, Washington · 12978 days ago · -1 km deep · 76 km away
  12. 2.138 km NNE of Amboy, Washington · 12978 days ago · 1 km deep · 73 km away
  13. 1.91 km WNW of Maple Valley, Washington · 12979 days ago · 7 km deep · 73 km away
  14. 1.816 km S of Morton, Washington · 12980 days ago · 10 km deep · 57 km away
  15. 2.410 km SSE of Mineral, Washington · 12981 days ago · 15 km deep · 35 km away
  16. 2.71 km SE of Ames Lake, Washington · 12983 days ago · 22 km deep · 95 km away
  17. 2.63 km WSW of Fox Island, Washington · 12984 days ago · 49 km deep · 87 km away
  18. 1.525 km S of Morton, Washington · 12985 days ago · 8 km deep · 64 km away
  19. 2.10 km W of Normandy Park, Washington · 12986 days ago · 18 km deep · 86 km away
  20. 2.02 km WNW of Maple Valley, Washington · 12988 days ago · 3 km deep · 73 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10272873. Read Fri, Oct 2, 2026, 9:42 AM UTC.