Washington earthquakes

M1.5 earthquake 5 km SSW of Geneva, Washington

A magnitude 1.5 earthquake struck 5 km SSW of Geneva, Washington on Thu, Aug 6, 1987, 10:43 PM PDT (05:43 UTC), 12 km (8 mi) below the surface.

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

Geneva 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
1.5 (md), micro
Local time
UTC
1987-08-07 05:43:50 UTC
Depth
12.4 km (7.7 mi), shallow
Epicenter
48.705° N, 122.436° 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 1.2 km horizontally, 2.8 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
173°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 1.76 km SSW of Geneva, Washington · 14297 days ago · 12 km deep · 1 km away
  2. 1.715 km ESE of Oak Bay, Canada · 14285 days ago · 5 km deep · 60 km away
  3. 1.72 km SSW of Birch Bay, Washington · 14284 days ago · 13 km deep · 32 km away
  4. 1.65 km NNW of Orcas, Washington · 14283 days ago · 18 km deep · 40 km away
  5. 1.631 km NNW of Chilliwack, Canada · 14283 days ago · -1 km deep · 83 km away
  6. 2.02 km WSW of Birch Bay, Washington · 14277 days ago · 15 km deep · 34 km away
  7. 1.96 km SSE of Concrete, Washington · 14276 days ago · 2 km deep · 58 km away
  8. 1.515 km E of North Saanich, Canada · 14266 days ago · 50 km deep · 57 km away
  9. 1.710 km NW of Marblemount, Washington · 14265 days ago · -1 km deep · 67 km away
  10. 1.79 km NNW of Marblemount, Washington · 14264 days ago · 0 km deep · 68 km away
  11. 1.816 km SE of Glacier, Washington · 14261 days ago · 25 km deep · 47 km away
  12. 3.04 km WSW of Langley, Canada · 14258 days ago · 1 km deep · 47 km away
  13. 2.34 km WSW of Langley, Canada · 14256 days ago · 4 km deep · 47 km away
  14. 2.82 km N of Port Townsend, Washington · 14255 days ago · 21 km deep · 67 km away
  15. 2.85 km NE of Blyn, Washington · 14254 days ago · 55 km deep · 82 km away
  16. 2.15 km NE of Kingston, Washington · 14250 days ago · 16 km deep · 97 km away

Before

  1. 2.06 km SW of Geneva, Washington · 14299 days ago · 12 km deep · 2 km away
  2. 2.71 km N of Port Townsend, Washington · 14299 days ago · 22 km deep · 68 km away
  3. 1.74 km E of Maple Falls, Washington · 14309 days ago · 0 km deep · 39 km away
  4. 1.54 km SSW of Big Lake, Washington · 14315 days ago · 18 km deep · 40 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10221583. Read Tue, Sep 29, 2026, 7:25 PM UTC.