Washington earthquakes

M1.8 earthquake 16 km SE of Glacier, Washington

A magnitude 1.8 earthquake struck 16 km SE of Glacier, Washington on Sun, Sep 13, 1987, 5:24 PM PDT (00:24 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M3.0 4 km WSW of Langley, Canada. This one was a foreshock.

Concrete 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
1.8 (md), micro
Local time
UTC
1987-09-14 00:24:43 UTC
Depth
25.3 km (15.7 mi), shallow
Epicenter
48.775° N, 121.799° 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, 0.6 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
232°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 3.04 km WSW of Langley, Canada · 14258 days ago · 1 km deep · 75 km away
  2. 2.34 km WSW of Langley, Canada · 14256 days ago · 4 km deep · 75 km away
  3. 2.82 km N of Port Townsend, Washington · 14255 days ago · 21 km deep · 100 km away
  4. 2.041 km W of Winthrop, Washington · 14247 days ago · 4 km deep · 87 km away
  5. 1.713 km WNW of Chilliwack, Canada · 14215 days ago · -1 km deep · 52 km away
  6. 1.99 km NNW of Ault Field, Washington · 14214 days ago · 52 km deep · 79 km away
  7. 1.632 km SE of Darrington, Washington · 14208 days ago · 14 km deep · 88 km away
  8. 2.055 km ESE of Darrington, Washington · 14208 days ago · 0 km deep · 98 km away
  9. 2.41 km E of Ferndale, Washington · 14206 days ago · 18 km deep · 57 km away
  10. 1.56 km ENE of Verlot, Washington · 14205 days ago · 14 km deep · 74 km away

Before

  1. 1.79 km NNW of Marblemount, Washington · 14264 days ago · 0 km deep · 28 km away
  2. 1.710 km NW of Marblemount, Washington · 14265 days ago · -1 km deep · 27 km away
  3. 1.96 km SSE of Concrete, Washington · 14276 days ago · 2 km deep · 32 km away
  4. 2.02 km WSW of Birch Bay, Washington · 14277 days ago · 15 km deep · 73 km away
  5. 2.457 km SE of Hope, Canada · 14278 days ago · 34 km deep · 66 km away
  6. 1.631 km NNW of Chilliwack, Canada · 14283 days ago · -1 km deep · 76 km away
  7. 1.65 km NNW of Orcas, Washington · 14284 days ago · 18 km deep · 87 km away
  8. 1.72 km SSW of Birch Bay, Washington · 14284 days ago · 13 km deep · 71 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10223903. Read Tue, Sep 29, 2026, 8:30 PM UTC.