Washington earthquakes

M1.6 earthquake 20 km S of Morton, Washington

A magnitude 1.6 earthquake struck 20 km S of Morton, Washington on Sun, Jan 24, 1988, 4:23 PM PST (00:23 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M1.8 10 km E of Ashford, 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
1.6 (md), micro
Local time
UTC
1988-01-25 00:23:29 UTC
Depth
9.2 km (5.7 mi), shallow
Epicenter
46.372° N, 122.251° 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 0.5 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
153°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 1.62 km NNE of North Bonneville, Washington · 14119 days ago · -1 km deep · 82 km away
  2. 1.61 km NE of North Bonneville, Washington · 14117 days ago · 1 km deep · 84 km away
  3. 1.810 km E of Ashford, Washington · 14095 days ago · 7 km deep · 52 km away
  4. 2.223 km ESE of Packwood, Washington · 14089 days ago · -1 km deep · 68 km away
  5. 1.525 km ESE of Packwood, Washington · 14089 days ago · 2 km deep · 70 km away
  6. 2.42 km NNW of Custer, Washington · 14083 days ago · 54 km deep · 95 km away
  7. 2.39 km SW of Packwood, Washington · 14080 days ago · 9 km deep · 42 km away
  8. 3.92 km WNW of Puyallup, Washington · 14075 days ago · 64 km deep · 91 km away
  9. 1.58 km SSE of Lebam, Washington · 14071 days ago · 23 km deep · 96 km away
  10. 1.911 km NE of Ashford, Washington · 14069 days ago · 10 km deep · 56 km away
  11. 1.68 km E of Bucoda, Washington · 14064 days ago · 8 km deep · 61 km away

Before

  1. 1.510 km NE of Ashford, Washington · 14124 days ago · 10 km deep · 56 km away
  2. 1.922 km ENE of Ashford, Washington · 14131 days ago · 0 km deep · 65 km away
  3. 2.723 km ENE of Ashford, Washington · 14131 days ago · 1 km deep · 65 km away
  4. 2.24 km SE of Orting, Washington · 14135 days ago · 5 km deep · 78 km away
  5. 2.03 km NE of North Bonneville, Washington · 14136 days ago · 3 km deep · 83 km away
  6. 2.03 km SW of Crocker, Washington · 14137 days ago · 0 km deep · 76 km away
  7. 2.24 km SE of Orting, Washington · 14137 days ago · 6 km deep · 78 km away
  8. 2.73 km WSW of Crocker, Washington · 14138 days ago · -1 km deep · 78 km away
  9. 1.52 km NE of North Bonneville, Washington · 14139 days ago · 2 km deep · 83 km away
  10. 1.97 km S of Morton, Washington · 14149 days ago · 15 km deep · 13 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10229788. Read Tue, Sep 22, 2026, 10:24 PM UTC.