Washington earthquakes

M1.5 earthquake 11 km E of Enumclaw, Washington

A magnitude 1.5 earthquake struck 11 km E of Enumclaw, Washington on Thu, Sep 30, 1999, 10:57 PM PDT (05:57 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M2.5 12 km WSW of Packwood, Washington. This one was a foreshock.

Enumclaw 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
1999-10-01 05:57:42 UTC
Depth
1.7 km (1.1 mi), shallow
Epicenter
47.222° N, 121.841° 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 0.5 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
87°
Stations used
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 2.512 km WSW of Packwood, Washington · 9852 days ago · 3 km deep · 75 km away
  2. 1.62 km N of Gorst, Washington · 9850 days ago · -1 km deep · 74 km away
  3. 1.610 km N of Thorp, Washington · 9844 days ago · 3 km deep · 89 km away
  4. 2.120 km ENE of Ashford, Washington · 9844 days ago · -2 km deep · 43 km away
  5. 1.721 km ENE of Ashford, Washington · 9840 days ago · 0 km deep · 43 km away
  6. 1.71 km NNE of Bothell, Washington · 9836 days ago · 27 km deep · 67 km away
  7. 1.63 km NE of Woods Creek, Washington · 9833 days ago · -1 km deep · 75 km away
  8. 1.64 km NE of North Bend, Washington · 9831 days ago · 16 km deep · 35 km away
  9. 1.610 km NE of Snoqualmie, Washington · 9831 days ago · 14 km deep · 43 km away
  10. 1.51 km WNW of Lea Hill, Washington · 9831 days ago · 63 km deep · 29 km away
  11. 1.77 km SSW of Morton, Washington · 9824 days ago · 18 km deep · 88 km away
  12. 1.714 km NNE of Ashford, Washington · 9823 days ago · 9 km deep · 40 km away
  13. 1.63 km NE of Snoqualmie, Washington · 9816 days ago · 14 km deep · 36 km away
  14. 1.63 km N of Tieton, Washington · 9810 days ago · 9 km deep · 98 km away
  15. 2.52 km SW of Monroe North, Washington · 9807 days ago · 19 km deep · 73 km away
  16. 1.826 km NNE of Index, Washington · 9806 days ago · 5 km deep · 97 km away
  17. 2.06 km SSE of Vashon, Washington · 9795 days ago · 18 km deep · 49 km away

Before

  1. 1.727 km ENE of Ashford, Washington · 9855 days ago · -2 km deep · 42 km away
  2. 2.01 km ENE of Bellevue, Washington · 9859 days ago · 6 km deep · 51 km away
  3. 2.224 km ENE of Packwood, Washington · 9860 days ago · 5 km deep · 70 km away
  4. 2.19 km NNE of Snoqualmie, Washington · 9865 days ago · 15 km deep · 43 km away
  5. 1.79 km NNE of Snoqualmie, Washington · 9865 days ago · 16 km deep · 43 km away
  6. 2.8Washington · 9865 days ago · 16 km deep · 43 km away
  7. 1.625 km N of Packwood, Washington · 9868 days ago · -3 km deep · 46 km away
  8. 2.23 km ESE of Indianola, Washington · 9871 days ago · 22 km deep · 75 km away
  9. 1.628 km ENE of Ashford, Washington · 9878 days ago · -3 km deep · 41 km away
  10. 1.73 km S of Monroe, Washington · 9879 days ago · 2 km deep · 68 km away
  11. 2.85 km SSW of Shelton, Washington · 9879 days ago · 46 km deep · 97 km away
  12. 1.88 km SSW of Sultan, Washington · 9880 days ago · 7 km deep · 63 km away
  13. 1.53 km S of Lake Roesiger, Washington · 9882 days ago · 11 km deep · 82 km away
  14. 1.88 km ENE of Duvall, Washington · 9882 days ago · 6 km deep · 61 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10475738. Read Wed, Sep 23, 2026, 2:47 AM UTC.