Washington earthquakes

M1.7 earthquake 15 km SW of Cascade Valley, Washington

A magnitude 1.7 earthquake struck 15 km SW of Cascade Valley, Washington on Wed, Feb 24, 1988, 5:15 PM PST (01:15 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M1.8 25 km WSW of Othello, Washington. This one was a foreshock.

Cascade Valley 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
1.7 (md), micro
Local time
UTC
1988-02-25 01:15:09 UTC
Depth
0.6 km (0.4 mi), shallow
Epicenter
47.020° N, 119.452° 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 0.8 km horizontally
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
62°
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 12 in the 30 days before it.

After

  1. 1.66 km N of Waterville, Washington · 14087 days ago · 5 km deep · 89 km away
  2. 1.825 km WSW of Othello, Washington · 14082 days ago · 0 km deep · 35 km away
  3. 1.525 km WSW of Othello, Washington · 14077 days ago · 0 km deep · 35 km away
  4. 1.77 km NNE of Waterville, Washington · 14074 days ago · 4 km deep · 88 km away
  5. 2.67 km NNE of Richland, Washington · 14067 days ago · 0 km deep · 76 km away
  6. 2.57 km N of Richland, Washington · 14067 days ago · 0 km deep · 76 km away
  7. 1.57 km N of Richland, Washington · 14067 days ago · 0 km deep · 76 km away
  8. 2.117 km SW of Ellensburg, Washington · 14067 days ago · 8 km deep · 98 km away
  9. 1.88 km SW of Warden, Washington · 14063 days ago · 3 km deep · 28 km away
  10. 2.16 km SW of Warden, Washington · 14059 days ago · 2 km deep · 30 km away
  11. 2.67 km SW of Warden, Washington · 14053 days ago · 3 km deep · 29 km away
  12. 2.011 km SSW of Harrington, Washington · 14047 days ago · 45 km deep · 96 km away
  13. 2.67 km WSW of George, Washington · 14046 days ago · 0 km deep · 37 km away
  14. 1.79 km SW of Chelan Falls, Washington · 14046 days ago · 4 km deep · 91 km away
  15. 1.920 km N of Ritzville, Washington · 14042 days ago · 18 km deep · 90 km away
  16. 2.96 km ENE of Chelan, Washington · 14032 days ago · 0 km deep · 100 km away
  17. 1.96 km ENE of Chelan, Washington · 14032 days ago · 0 km deep · 99 km away
  18. 1.55 km E of Chelan, Washington · 14032 days ago · 3 km deep · 99 km away
  19. 1.84 km WNW of Waterville, Washington · 14031 days ago · 3 km deep · 88 km away

Before

  1. 2.313 km SSW of Cascade Valley, Washington · 14090 days ago · 0 km deep · 3 km away
  2. 1.518 km WSW of Othello, Washington · 14096 days ago · 0 km deep · 30 km away
  3. 1.722 km WSW of Othello, Washington · 14103 days ago · 0 km deep · 31 km away
  4. 2.35 km SW of Connell, Washington · 14104 days ago · 2 km deep · 60 km away
  5. 1.92 km NNE of Mesa, Washington · 14107 days ago · 5 km deep · 59 km away
  6. 3.04 km ENE of Waterville, Washington · 14108 days ago · 6 km deep · 84 km away
  7. 2.119 km WSW of Othello, Washington · 14108 days ago · 0 km deep · 31 km away
  8. 1.919 km WSW of Othello, Washington · 14110 days ago · 1 km deep · 31 km away
  9. 1.919 km WSW of Othello, Washington · 14111 days ago · 1 km deep · 31 km away
  10. 2.919 km WSW of Othello, Washington · 14111 days ago · 2 km deep · 31 km away
  11. 2.119 km WSW of Othello, Washington · 14112 days ago · 0 km deep · 31 km away
  12. 2.919 km WSW of Othello, Washington · 14112 days ago · 0 km deep · 31 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10230793. Read Tue, Sep 22, 2026, 9:38 AM UTC.