Washington earthquakes

M1.5 earthquake 37 km S of Morton, Washington

A magnitude 1.5 earthquake struck 37 km S of Morton, Washington on Tue, Aug 1, 1989, 12:38 AM PDT (07:38 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M3.7 4 km SE of Mill Plain, Washington. This one was a foreshock.

Morton 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
1989-08-01 07:38:13 UTC
Depth
-1.0 km (-0.6 mi), shallow
Epicenter
46.225° N, 122.281° 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 1.2 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
331°, poorly surrounded by stations
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 29 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 3.74 km SE of Mill Plain, Washington · 13575 days ago · 14 km deep · 70 km away
  2. 1.94 km WNW of Camas, Washington · 13575 days ago · 12 km deep · 70 km away
  3. 1.8Washington · 13569 days ago · -1 km deep · 78 km away
  4. 1.538 km NNE of Amboy, Washington · 13568 days ago · -2 km deep · 8 km away
  5. 1.638 km NNE of Amboy, Washington · 13564 days ago · -2 km deep · 8 km away
  6. 2.32 km SSE of La Center, Washington · 13564 days ago · 16 km deep · 51 km away
  7. 2.337 km NNE of Amboy, Washington · 13563 days ago · 0 km deep · 7 km away
  8. 1.89 km E of Ashford, Washington · 13562 days ago · 2 km deep · 65 km away
  9. 1.923 km ENE of Ashford, Washington · 13562 days ago · -2 km deep · 81 km away
  10. 2.124 km ENE of Ashford, Washington · 13560 days ago · -1 km deep · 82 km away
  11. 1.724 km ENE of Ashford, Washington · 13559 days ago · -2 km deep · 82 km away
  12. 1.938 km NNE of Amboy, Washington · 13557 days ago · -1 km deep · 7 km away
  13. 2.737 km NNE of Amboy, Washington · 13552 days ago · -2 km deep · 7 km away
  14. 1.737 km NNE of Amboy, Washington · 13551 days ago · -1 km deep · 7 km away
  15. 1.737 km NNE of Amboy, Washington · 13551 days ago · -2 km deep · 8 km away
  16. 1.737 km NNE of Amboy, Washington · 13551 days ago · -2 km deep · 8 km away
  17. 2.66 km N of Cherry Grove, Washington · 13548 days ago · 13 km deep · 47 km away
  18. 1.66 km E of La Center, Washington · 13548 days ago · 15 km deep · 47 km away
  19. 2.03 km ENE of Kelso, Washington · 13542 days ago · 21 km deep · 46 km away
  20. 1.938 km NNE of Amboy, Washington · 13539 days ago · -2 km deep · 7 km away
  21. 2.524 km ENE of Ashford, Washington · 13538 days ago · -2 km deep · 82 km away
  22. 2.124 km ENE of Ashford, Washington · 13538 days ago · -2 km deep · 82 km away
  23. 1.526 km SSE of Mossyrock, Washington · 13536 days ago · 0 km deep · 11 km away
  24. 1.629 km SSE of Mossyrock, Washington · 13536 days ago · 5 km deep · 10 km away
  25. 2.06 km ESE of McKenna, Washington · 13531 days ago · 21 km deep · 79 km away
  26. 1.529 km SW of Nile, Washington · 13531 days ago · 2 km deep · 93 km away
  27. 2.023 km S of Morton, Washington · 13530 days ago · 8 km deep · 14 km away
  28. 1.529 km ENE of Kelso, Washington · 13530 days ago · -1 km deep · 20 km away
  29. 2.136 km SSE of Morton, Washington · 13525 days ago · 6 km deep · 15 km away

Before

  1. 1.518 km NNE of Ashford, Washington · 13581 days ago · 10 km deep · 81 km away
  2. 1.71 km SE of Kapowsin, Washington · 13582 days ago · 13 km deep · 84 km away
  3. 2.912 km WSW of Packwood, Washington · 13586 days ago · 2 km deep · 51 km away
  4. 1.838 km NNE of Amboy, Washington · 13597 days ago · 2 km deep · 8 km away
  5. 1.928 km NW of Trout Lake, Washington · 13600 days ago · -1 km deep · 41 km away
  6. 1.66 km SW of Morton, Washington · 13604 days ago · 21 km deep · 34 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10245203. Read Thu, Oct 1, 2026, 5:14 PM UTC.