Washington earthquakes

M2.8 earthquake Washington

A magnitude 2.8 earthquake struck in Washington on Mon, Sep 20, 1999, 4:16 AM PDT (11:16 UTC), 16 km (10 mi) below the surface.

Snoqualmie 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
2.8 (md), micro
Local time
UTC
1999-09-20 11:16:54 UTC
Depth
16.4 km (10.2 mi), shallow
Epicenter
47.607° N, 121.764° 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 0.4 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
34°
Stations used
53

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 15 in the 30 days before it.

After

  1. 1.79 km NNE of Snoqualmie, Washington · 9865 days ago · 16 km deep · 1 km away
  2. 2.19 km NNE of Snoqualmie, Washington · 9865 days ago · 15 km deep · 0 km away
  3. 2.01 km ENE of Bellevue, Washington · 9859 days ago · 6 km deep · 32 km away
  4. 1.727 km ENE of Ashford, Washington · 9855 days ago · -2 km deep · 84 km away
  5. 1.511 km E of Enumclaw, Washington · 9854 days ago · 2 km deep · 43 km away
  6. 1.62 km N of Gorst, Washington · 9851 days ago · -1 km deep · 71 km away
  7. 1.610 km N of Thorp, Washington · 9844 days ago · 3 km deep · 96 km away
  8. 2.120 km ENE of Ashford, Washington · 9844 days ago · -2 km deep · 85 km away
  9. 1.721 km ENE of Ashford, Washington · 9840 days ago · 0 km deep · 85 km away
  10. 1.71 km NNE of Bothell, Washington · 9836 days ago · 27 km deep · 38 km away
  11. 1.63 km NE of Woods Creek, Washington · 9833 days ago · -1 km deep · 33 km away
  12. 1.64 km NE of North Bend, Washington · 9831 days ago · 16 km deep · 9 km away
  13. 1.610 km NE of Snoqualmie, Washington · 9831 days ago · 14 km deep · 1 km away
  14. 1.51 km WNW of Lea Hill, Washington · 9831 days ago · 63 km deep · 45 km away
  15. 1.714 km NNE of Ashford, Washington · 9823 days ago · 9 km deep · 83 km away
  16. 1.63 km NE of Snoqualmie, Washington · 9816 days ago · 14 km deep · 7 km away
  17. 2.52 km SW of Monroe North, Washington · 9808 days ago · 19 km deep · 34 km away
  18. 1.826 km NNE of Index, Washington · 9807 days ago · 5 km deep · 55 km away

Before

  1. 1.625 km N of Packwood, Washington · 9868 days ago · -3 km deep · 87 km away
  2. 2.23 km ESE of Indianola, Washington · 9872 days ago · 22 km deep · 55 km away
  3. 1.628 km ENE of Ashford, Washington · 9878 days ago · -3 km deep · 82 km away
  4. 1.73 km S of Monroe, Washington · 9879 days ago · 2 km deep · 29 km away
  5. 1.88 km SSW of Sultan, Washington · 9880 days ago · 7 km deep · 22 km away
  6. 1.53 km S of Lake Roesiger, Washington · 9882 days ago · 11 km deep · 41 km away
  7. 1.88 km ENE of Duvall, Washington · 9882 days ago · 6 km deep · 20 km away
  8. 1.62 km WNW of Mirrormont, Washington · 9888 days ago · 17 km deep · 25 km away
  9. 1.69 km NNE of Lake Marcel-Stillwater, Washington · 9889 days ago · 1 km deep · 18 km away
  10. 2.08 km NNE of Lake Marcel-Stillwater, Washington · 9891 days ago · 7 km deep · 18 km away
  11. 1.66 km SW of Lofall, Washington · 9891 days ago · 16 km deep · 74 km away
  12. 1.54 km NE of Cliffdell, Washington · 9891 days ago · -1 km deep · 90 km away
  13. 1.731 km SSE of Greenwater, Washington · 9892 days ago · -1 km deep · 82 km away
  14. 1.54 km E of Dash Point, Washington · 9893 days ago · 22 km deep · 56 km away
  15. 2.03 km NNW of Port Townsend, Washington · 9894 days ago · 21 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10484873 (also filed as usp0009epr). Read Wed, Sep 23, 2026, 10:13 AM UTC.