Washington earthquakes

M1.7 earthquake 23 km ENE of Yacolt, Washington

A magnitude 1.7 earthquake struck 23 km ENE of Yacolt, Washington on Mon, Apr 11, 1988, 5:45 PM PDT (00:45 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.0 24 km ENE of Yacolt, Washington. This one was a foreshock.

Yacolt 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), micro
Local time
UTC
1988-04-12 00:45:44 UTC
Depth
4.6 km (2.9 mi), shallow
Epicenter
45.946° N, 122.123° 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 1.5 km horizontally, 1.7 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
116°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 1.823 km ENE of Yacolt, Washington · 14049 days ago · 5 km deep · 1 km away
  2. 3.024 km ENE of Yacolt, Washington · 14049 days ago · 3 km deep · 1 km away
  3. 1.89 km S of Morton, Washington · 14037 days ago · 7 km deep · 60 km away
  4. 1.738 km NNE of Amboy, Washington · 14033 days ago · 3 km deep · 29 km away
  5. 1.638 km NNE of Amboy, Washington · 14030 days ago · 3 km deep · 29 km away
  6. 1.922 km S of Morton, Washington · 14028 days ago · 10 km deep · 47 km away
  7. 1.541 km SSE of Morton, Washington · 14022 days ago · 0 km deep · 34 km away
  8. 2.58 km NNE of Government Camp, Oregon · 14016 days ago · 5 km deep · 71 km away
  9. 1.537 km NNE of Amboy, Washington · 14011 days ago · -2 km deep · 29 km away
  10. 1.58 km WNW of North Portland, Oregon · 14011 days ago · 17 km deep · 62 km away
  11. 1.733 km SE of Morton, Washington · 14009 days ago · -1 km deep · 43 km away
  12. 1.610 km SSE of Mossyrock, Washington · 14009 days ago · 17 km deep · 61 km away
  13. 1.93 km W of Ryderwood, Washington · 13998 days ago · 52 km deep · 88 km away
  14. 1.78 km E of Yacolt, Washington · 13993 days ago · 5 km deep · 17 km away

Before

  1. 1.55 km SW of Packwood, Washington · 14057 days ago · 8 km deep · 77 km away
  2. 1.938 km NE of Amboy, Washington · 14060 days ago · 8 km deep · 28 km away
  3. 1.911 km NE of Ashford, Washington · 14075 days ago · 10 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10229873. Read Tue, Sep 29, 2026, 9:10 AM UTC.