Washington earthquakes

M2.6 earthquake 1 km NE of Riverton, Washington

A magnitude 2.6 earthquake struck 1 km NE of Riverton, Washington on Tue, Apr 7, 1987, 8:25 AM PDT (15:25 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M2.8 3 km W of Chico, Washington. This one was a foreshock.

Riverton forecastMore in Washington

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
2.6 (md), micro
Local time
UTC
1987-04-07 15:25:01 UTC
Depth
25.3 km (15.7 mi), shallow
Epicenter
47.496° N, 122.281° 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 0.3 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
48°
Stations used
41

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. 1.78 km NNE of Snoqualmie, Washington · 14419 days ago · 8 km deep · 40 km away
  2. 1.61 km NE of Riverton, Washington · 14417 days ago · 24 km deep · 0 km away
  3. 2.51 km NE of Riverton, Washington · 14411 days ago · 23 km deep · 0 km away
  4. 1.61 km NNW of Fall City, Washington · 14407 days ago · 8 km deep · 30 km away
  5. 1.619 km N of Packwood, Washington · 14405 days ago · 6 km deep · 94 km away
  6. 2.83 km W of Chico, Washington · 14399 days ago · 20 km deep · 38 km away
  7. 2.11 km E of Algona, Washington · 14384 days ago · 12 km deep · 25 km away
  8. 1.54 km W of Chico, Washington · 14367 days ago · 21 km deep · 39 km away
  9. 2.13 km SSW of Clinton, Washington · 14364 days ago · 28 km deep · 50 km away
  10. 1.76 km W of Burley, Washington · 14364 days ago · 23 km deep · 33 km away

Before

  1. 2.83 km SSW of Swede Heaven, Washington · 14422 days ago · 1 km deep · 93 km away
  2. 2.27 km ENE of Lofall, Washington · 14429 days ago · 8 km deep · 45 km away
  3. 1.715 km SE of Ashford, Washington · 14431 days ago · 7 km deep · 97 km away
  4. 2.13 km SSW of Swede Heaven, Washington · 14438 days ago · 3 km deep · 93 km away
  5. 1.50 km SSW of Echo Lake, Washington · 14440 days ago · 21 km deep · 36 km away
  6. 2.83 km SW of Swede Heaven, Washington · 14440 days ago · 3 km deep · 93 km away
  7. 1.61 km SSW of Mercer Island, Washington · 14446 days ago · 5 km deep · 8 km away
  8. 2.33 km S of Seattle, Washington · 14446 days ago · 12 km deep · 10 km away

Earthquakes todayWashington earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10217518. Read Mon, Sep 28, 2026, 11:27 PM UTC.