Washington earthquakes

M1.6 earthquake 6 km N of Waterville, Washington

A magnitude 1.6 earthquake struck 6 km N of Waterville, Washington on Fri, Feb 26, 1988, 3:50 PM PST (23:50 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.9 6 km ENE of Chelan, Washington. This one was a foreshock.

Waterville 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
1.6 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1988-02-26 23:50:47 UTC
Depth
4.6 km (2.9 mi), shallow
Epicenter
47.707° N, 120.065° 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, 1.2 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
163°
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: 9 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 1.77 km NNE of Waterville, Washington · 14083 days ago · 4 km deep · 3 km away
  2. 2.527 km NNW of Leavenworth, Washington · 14080 days ago · 9 km deep · 59 km away
  3. 1.917 km N of Cashmere, Washington · 14062 days ago · 0 km deep · 29 km away
  4. 2.67 km WSW of George, Washington · 14056 days ago · 0 km deep · 74 km away
  5. 1.79 km SW of Chelan Falls, Washington · 14055 days ago · 4 km deep · 3 km away
  6. 2.96 km ENE of Chelan, Washington · 14041 days ago · 0 km deep · 19 km away
  7. 1.96 km ENE of Chelan, Washington · 14041 days ago · 0 km deep · 19 km away
  8. 1.55 km E of Chelan, Washington · 14041 days ago · 3 km deep · 19 km away
  9. 1.84 km WNW of Waterville, Washington · 14040 days ago · 3 km deep · 6 km away

Before

  1. 1.715 km SW of Cascade Valley, Washington · 14098 days ago · 1 km deep · 89 km away
  2. 2.313 km SSW of Cascade Valley, Washington · 14099 days ago · 0 km deep · 89 km away
  3. 1.721 km N of Leavenworth, Washington · 14116 days ago · 3 km deep · 43 km away
  4. 3.04 km ENE of Waterville, Washington · 14117 days ago · 6 km deep · 6 km away
  5. 1.518 km SW of Disautel, Washington · 14123 days ago · 0 km deep · 76 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10231008. Read Thu, Oct 1, 2026, 12:34 PM UTC.