Washington earthquakes

M1.7 earthquake 13 km NW of Morton, Washington

A magnitude 1.7 earthquake struck 13 km NW of Morton, Washington on Fri, Jul 15, 1988, 9:31 AM PDT (16:31 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M4.1 13 km NE 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
1.7 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1988-07-15 16:31:03 UTC
Depth
21.0 km (13.1 mi), shallow
Epicenter
46.642° N, 122.408° 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, 0.5 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
55°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 38 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 1.53 km WSW of Artondale, Washington · 13955 days ago · 25 km deep · 75 km away
  2. 1.737 km NNE of Amboy, Washington · 13952 days ago · 3 km deep · 52 km away
  3. 2.224 km ENE of Ashford, Washington · 13949 days ago · -1 km deep · 56 km away
  4. 1.81 km SE of Parkwood, Washington · 13944 days ago · 42 km deep · 99 km away
  5. 4.113 km NE of Ashford, Washington · 13944 days ago · 11 km deep · 44 km away
  6. 1.514 km NE of Ashford, Washington · 13944 days ago · 9 km deep · 45 km away
  7. 1.514 km NE of Ashford, Washington · 13944 days ago · 9 km deep · 45 km away
  8. 2.014 km NE of Ashford, Washington · 13944 days ago · 8 km deep · 45 km away
  9. 3.813 km NE of Ashford, Washington · 13944 days ago · 10 km deep · 44 km away
  10. 1.914 km NE of Ashford, Washington · 13944 days ago · 9 km deep · 45 km away
  11. 1.914 km NE of Ashford, Washington · 13944 days ago · 9 km deep · 45 km away
  12. 1.817 km NNE of Ashford, Washington · 13944 days ago · 4 km deep · 45 km away
  13. 1.714 km NE of Ashford, Washington · 13944 days ago · 9 km deep · 45 km away
  14. 1.813 km NE of Ashford, Washington · 13944 days ago · 9 km deep · 44 km away
  15. 1.813 km NE of Ashford, Washington · 13943 days ago · 7 km deep · 44 km away
  16. 1.514 km NE of Ashford, Washington · 13942 days ago · 9 km deep · 46 km away
  17. 2.111 km NE of Ashford, Washington · 13938 days ago · 6 km deep · 42 km away
  18. 1.513 km NE of Ashford, Washington · 13937 days ago · 9 km deep · 45 km away
  19. 1.720 km NE of Ashford, Washington · 13934 days ago · 8 km deep · 50 km away
  20. 1.820 km NE of Ashford, Washington · 13934 days ago · 9 km deep · 50 km away
  21. 1.72 km NE of Midland, Washington · 13933 days ago · 26 km deep · 60 km away
  22. 1.613 km NE of Ashford, Washington · 13932 days ago · 9 km deep · 44 km away
  23. 3.012 km NE of Ashford, Washington · 13930 days ago · 10 km deep · 43 km away
  24. 1.512 km NE of Ashford, Washington · 13930 days ago · 9 km deep · 44 km away
  25. 2.413 km NNE of Ashford, Washington · 13927 days ago · 10 km deep · 43 km away
  26. 2.67 km WSW of Wilderness Rim, Washington · 13926 days ago · 18 km deep · 97 km away
  27. 1.638 km NNE of Amboy, Washington · 13918 days ago · 3 km deep · 52 km away
  28. 1.625 km N of Trout Lake, Washington · 13918 days ago · -1 km deep · 83 km away
  29. 1.81 km E of Black Diamond, Washington · 13916 days ago · 19 km deep · 81 km away
  30. 1.520 km S of Morton, Washington · 13915 days ago · 10 km deep · 32 km away
  31. 1.614 km NE of Ashford, Washington · 13911 days ago · 9 km deep · 45 km away
  32. 1.71 km NNW of Elbe, Washington · 13909 days ago · 17 km deep · 22 km away
  33. 1.54 km SSW of Wilderness Rim, Washington · 13909 days ago · 28 km deep · 97 km away
  34. 1.614 km SSE of Ashford, Washington · 13908 days ago · 6 km deep · 36 km away
  35. 1.93 km ESE of Packwood, Washington · 13904 days ago · 0 km deep · 60 km away
  36. 2.137 km SSE of Morton, Washington · 13903 days ago · 10 km deep · 51 km away
  37. 1.518 km SSE of Greenwater, Washington · 13902 days ago · 9 km deep · 75 km away
  38. 2.43 km WSW of Wilderness Rim, Washington · 13898 days ago · 18 km deep · 99 km away

Before

  1. 1.613 km ESE of Yacolt, Washington · 13958 days ago · 11 km deep · 91 km away
  2. 2.038 km NNE of Amboy, Washington · 13963 days ago · -1 km deep · 51 km away
  3. 1.91 km E of White Center, Washington · 13964 days ago · 23 km deep · 98 km away
  4. 1.8Washington-Oregon border region · 13965 days ago · 8 km deep · 94 km away
  5. 2.14 km WSW of Wilderness Rim, Washington · 13968 days ago · 18 km deep · 98 km away
  6. 2.14 km NNE of Key Center, Washington · 13969 days ago · 23 km deep · 85 km away
  7. 1.812 km SW of Packwood, Washington · 13976 days ago · 5 km deep · 47 km away
  8. 1.712 km ESE of Ashford, Washington · 13985 days ago · 5 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10234793. Read Fri, Oct 2, 2026, 12:34 PM UTC.