Washington earthquakes

M1.9 earthquake 39 km S of Morton, Washington

A magnitude 1.9 earthquake struck 39 km S of Morton, Washington on Tue, Feb 5, 1991, 7:55 AM PST (15:55 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M3.1 5 km ESE of Ridgefield, 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
1.9 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1991-02-05 15:55:15 UTC
Depth
0.7 km (0.4 mi), shallow
Epicenter
46.214° N, 122.178° 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 0.7 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
93°
Stations used
8

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 1.737 km NNE of Amboy, Washington · 13024 days ago · -1 km deep · 2 km away
  2. 1.537 km NE of Amboy, Washington · 13016 days ago · -2 km deep · 2 km away
  3. 1.836 km NNE of Amboy, Washington · 13016 days ago · 0 km deep · 4 km away
  4. 1.538 km NNE of Amboy, Washington · 13008 days ago · 0 km deep · 1 km away
  5. 2.610 km SSE of Mineral, Washington · 13007 days ago · 14 km deep · 46 km away
  6. 2.23 km N of North Portland, Oregon · 13007 days ago · 14 km deep · 76 km away
  7. 1.71 km NNE of Mill Plain, Washington · 13006 days ago · 11 km deep · 67 km away
  8. 1.810 km ENE of Ashford, Washington · 13000 days ago · -1 km deep · 67 km away
  9. 3.15 km ESE of Ridgefield, Washington · 12997 days ago · 19 km deep · 61 km away
  10. 1.75 km ESE of Ridgefield, Washington · 12989 days ago · 19 km deep · 61 km away
  11. 1.525 km S of Morton, Washington · 12987 days ago · 8 km deep · 13 km away
  12. 2.410 km SSE of Mineral, Washington · 12984 days ago · 15 km deep · 46 km away
  13. 1.97 km ESE of Venersborg, Washington · 12983 days ago · 4 km deep · 53 km away
  14. 1.816 km S of Morton, Washington · 12983 days ago · 10 km deep · 23 km away
  15. 1.55 km NE of Estacada, Oregon · 12981 days ago · 16 km deep · 99 km away
  16. 2.138 km NNE of Amboy, Washington · 12980 days ago · 1 km deep · 1 km away
  17. 1.835 km NNE of Amboy, Washington · 12980 days ago · -1 km deep · 4 km away
  18. 2.438 km NNE of Amboy, Washington · 12980 days ago · -1 km deep · 1 km away
  19. 1.636 km NNE of Amboy, Washington · 12980 days ago · -1 km deep · 3 km away
  20. 1.719 km S of Morton, Washington · 12978 days ago · 6 km deep · 21 km away
  21. 2.324 km S of Morton, Washington · 12972 days ago · 11 km deep · 15 km away
  22. 1.722 km ENE of Ashford, Washington · 12971 days ago · -2 km deep · 77 km away
  23. 1.922 km ENE of Ashford, Washington · 12971 days ago · -2 km deep · 77 km away
  24. 1.522 km ENE of Ashford, Washington · 12966 days ago · -1 km deep · 77 km away

Before

  1. 1.637 km NNE of Amboy, Washington · 13026 days ago · -1 km deep · 2 km away
  2. 1.511 km ESE of Yacolt, Washington · 13028 days ago · 8 km deep · 45 km away
  3. 1.813 km NNE of Ashford, Washington · 13030 days ago · 7 km deep · 75 km away
  4. 1.613 km SE of Rainier, Washington · 13031 days ago · 12 km deep · 71 km away
  5. 1.822 km NNW of Carson, Washington · 13033 days ago · 6 km deep · 39 km away
  6. 1.715 km S of Morton, Washington · 13040 days ago · 7 km deep · 23 km away
  7. 1.56 km SW of Packwood, Washington · 13040 days ago · 4 km deep · 52 km away
  8. 1.738 km NNE of Amboy, Washington · 13051 days ago · -1 km deep · 1 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10269173. Read Sun, Oct 4, 2026, 6:31 PM UTC.