Washington earthquakes

M1.5 earthquake 4 km W of Chico, Washington

A magnitude 1.5 earthquake struck 4 km W of Chico, Washington on Sat, May 30, 1987, 4:03 AM PDT (11:03 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M2.7 2 km E of Edmonds, Washington. This one was a foreshock.

Chico 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
1987-05-30 11:03:08 UTC
Depth
21.5 km (13.4 mi), shallow
Epicenter
47.607° N, 122.775° 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 0.6 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
69°
Stations used
23

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 2 in the 30 days before it.

After

  1. 2.13 km SSW of Clinton, Washington · 14365 days ago · 28 km deep · 48 km away
  2. 1.76 km W of Burley, Washington · 14364 days ago · 23 km deep · 21 km away
  3. 2.03 km NNW of Ravensdale, Washington · 14358 days ago · 6 km deep · 64 km away
  4. 2.06 km NE of Duvall, Washington · 14350 days ago · 20 km deep · 66 km away
  5. 2.49 km W of Gorst, Washington · 14348 days ago · 18 km deep · 9 km away
  6. 2.32 km W of Wilderness Rim, Washington · 14345 days ago · 21 km deep · 75 km away
  7. 2.72 km E of Edmonds, Washington · 14340 days ago · 15 km deep · 39 km away
  8. 1.911 km SSW of Port Hadlock-Irondale, Washington · 14337 days ago · 50 km deep · 37 km away
  9. 2.48 km W of Port Townsend, Washington · 14336 days ago · 45 km deep · 56 km away
  10. 1.58 km ENE of Hoodsport, Washington · 14335 days ago · 13 km deep · 28 km away
  11. 1.92 km WNW of City of Sammamish, Washington · 14333 days ago · 0 km deep · 53 km away
  12. 2.45 km ESE of Oak Harbor, Washington · 14330 days ago · 25 km deep · 76 km away
  13. 1.54 km SSW of Big Lake, Washington · 14315 days ago · 18 km deep · 92 km away
  14. 2.711 km ENE of Hoodsport, Washington · 14311 days ago · 15 km deep · 25 km away

Before

  1. 2.019 km SSE of Friday Harbor, Washington · 14373 days ago · 14 km deep · 85 km away
  2. 2.11 km E of Algona, Washington · 14385 days ago · 12 km deep · 55 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10221733. Read Tue, Sep 29, 2026, 9:51 AM UTC.