Washington earthquakes

M1.7 earthquake 33 km SE of Morton, Washington

A magnitude 1.7 earthquake struck 33 km SE of Morton, Washington on Sat, May 21, 1988, 7:08 PM PDT (02:08 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M2.3 4 km E of Tampico, 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
1.7 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1988-05-22 02:08:20 UTC
Depth
-0.8 km (-0.5 mi), shallow
Epicenter
46.323° N, 121.995° 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 0.3 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
66°
Stations used
33

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 1.610 km SSE of Mossyrock, Washington · 14013 days ago · 17 km deep · 38 km away
  2. 1.511 km S of Greenwater, Washington · 14008 days ago · 0 km deep · 85 km away
  3. 1.93 km W of Ryderwood, Washington · 14002 days ago · 52 km deep · 84 km away
  4. 1.78 km E of Yacolt, Washington · 13997 days ago · 5 km deep · 57 km away
  5. 2.34 km E of Tampico, Washington · 13994 days ago · 0 km deep · 93 km away
  6. 1.812 km NE of Packwood, Washington · 13991 days ago · 1 km deep · 52 km away
  7. 1.712 km ESE of Ashford, Washington · 13986 days ago · 5 km deep · 47 km away
  8. 1.812 km SW of Packwood, Washington · 13977 days ago · 5 km deep · 28 km away
  9. 1.8Washington-Oregon border region · 13966 days ago · 8 km deep · 69 km away
  10. 2.038 km NNE of Amboy, Washington · 13964 days ago · -1 km deep · 20 km away
  11. 1.613 km ESE of Yacolt, Washington · 13959 days ago · 11 km deep · 57 km away
  12. 1.713 km NW of Morton, Washington · 13959 days ago · 21 km deep · 48 km away

Before

  1. 1.58 km WNW of North Portland, Oregon · 14015 days ago · 17 km deep · 97 km away
  2. 1.537 km NNE of Amboy, Washington · 14015 days ago · -2 km deep · 21 km away
  3. 1.519 km SSE of Carbonado, Washington · 14022 days ago · 11 km deep · 67 km away
  4. 2.48 km WNW of Tieton, Washington · 14023 days ago · 7 km deep · 99 km away
  5. 1.541 km SSE of Morton, Washington · 14026 days ago · 0 km deep · 9 km away
  6. 1.818 km SSW of White Swan, Washington · 14027 days ago · -1 km deep · 91 km away
  7. 1.922 km S of Morton, Washington · 14032 days ago · 10 km deep · 20 km away
  8. 1.524 km ENE of Ashford, Washington · 14032 days ago · -1 km deep · 63 km away
  9. 1.638 km NNE of Amboy, Washington · 14034 days ago · 3 km deep · 20 km away
  10. 1.738 km NNE of Amboy, Washington · 14037 days ago · 3 km deep · 20 km away
  11. 1.89 km S of Morton, Washington · 14041 days ago · 7 km deep · 28 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10231468. Read Sat, Oct 3, 2026, 1:26 PM UTC.