Washington earthquakes

M2.6 earthquake 16 km WSW of Alder, Washington

A magnitude 2.6 earthquake struck 16 km WSW of Alder, Washington on Sun, Sep 13, 1987, 9:24 PM PDT (04:24 UTC), 18 km (11 mi) below the surface.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.6 (md), micro
Local time
UTC
1987-09-14 04:24:12 UTC
Depth
17.8 km (11.0 mi), shallow
Epicenter
46.720° N, 122.475° 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 0.0 km horizontally, 0.1 km in depth
Magnitude uncertainty
±0.04
Depth from
Operator assigned
Station coverage gap
35°
Stations used
48

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 8 in the 30 days before it.

After

  1. 1.53 km W of Deer Island, Oregon · 14252 days ago · 23 km deep · 93 km away
  2. 1.930 km E of Packwood, Washington · 14242 days ago · -1 km deep · 93 km away
  3. 1.715 km E of Castle Rock, Washington · 14238 days ago · 6 km deep · 51 km away
  4. 1.62 km W of Black Diamond, Washington · 14233 days ago · 13 km deep · 73 km away
  5. 2.16 km SSE of Wilderness Rim, Washington · 14231 days ago · 1 km deep · 93 km away
  6. 1.96 km SSE of Wilderness Rim, Washington · 14229 days ago · 1 km deep · 93 km away
  7. 2.021 km SSE of Mossyrock, Washington · 14222 days ago · 7 km deep · 42 km away
  8. 1.60 km SE of Lakeland South, Washington · 14221 days ago · 16 km deep · 64 km away
  9. 2.025 km ENE of Ashford, Washington · 14219 days ago · -1 km deep · 59 km away
  10. 1.81 km ENE of Vashon, Washington · 14212 days ago · 22 km deep · 82 km away
  11. 1.66 km E of Belfair, Washington · 14208 days ago · 19 km deep · 84 km away
  12. 1.87 km WSW of Wilderness Rim, Washington · 14204 days ago · 16 km deep · 90 km away
  13. 1.91 km SW of Rocky Point, Washington · 14203 days ago · 17 km deep · 97 km away
  14. 2.138 km NNE of Amboy, Washington · 14194 days ago · 4 km deep · 62 km away

Before

  1. 1.622 km S of Morton, Washington · 14255 days ago · 12 km deep · 44 km away
  2. 2.822 km S of Morton, Washington · 14256 days ago · 11 km deep · 44 km away
  3. 1.722 km S of Morton, Washington · 14256 days ago · 11 km deep · 44 km away
  4. 1.822 km S of Morton, Washington · 14256 days ago · 12 km deep · 44 km away
  5. 1.85 km NE of Ravensdale, Washington · 14259 days ago · 2 km deep · 85 km away
  6. 2.123 km ENE of Ashford, Washington · 14263 days ago · 1 km deep · 57 km away
  7. 1.72 km N of Black Diamond, Washington · 14277 days ago · 18 km deep · 77 km away
  8. 1.57 km ESE of Ravensdale, Washington · 14277 days ago · -1 km deep · 80 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10223923. Read Tue, Sep 22, 2026, 5:43 AM UTC.