Washington earthquakes

M1.6 earthquake 25 km N of Packwood, Washington

A magnitude 1.6 earthquake struck 25 km N of Packwood, Washington on Thu, Sep 16, 1999, 11:02 PM PDT (06:02 UTC), -3 km (-2 mi) below the surface.

A larger quake followed: M2.8 Washington. This one was a foreshock.

Carbonado 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
1999-09-17 06:02:33 UTC
Depth
-2.8 km (-1.7 mi), shallow
Epicenter
46.834° N, 121.613° 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 2.8 km horizontally, 5.2 km in depth
Magnitude uncertainty
±0.04
Depth from
Operator assigned
Station coverage gap
284°, poorly surrounded by stations
Stations used
5

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 5 in the 30 days before it.

After

  1. 2.8Washington · 9874 days ago · 16 km deep · 87 km away
  2. 1.79 km NNE of Snoqualmie, Washington · 9874 days ago · 16 km deep · 86 km away
  3. 2.19 km NNE of Snoqualmie, Washington · 9874 days ago · 15 km deep · 86 km away
  4. 2.224 km ENE of Packwood, Washington · 9870 days ago · 5 km deep · 25 km away
  5. 2.01 km ENE of Bellevue, Washington · 9869 days ago · 6 km deep · 97 km away
  6. 1.727 km ENE of Ashford, Washington · 9864 days ago · -2 km deep · 7 km away
  7. 1.511 km E of Enumclaw, Washington · 9863 days ago · 2 km deep · 46 km away
  8. 2.512 km WSW of Packwood, Washington · 9861 days ago · 3 km deep · 35 km away
  9. 1.610 km N of Thorp, Washington · 9854 days ago · 3 km deep · 81 km away
  10. 2.120 km ENE of Ashford, Washington · 9853 days ago · -2 km deep · 13 km away
  11. 1.721 km ENE of Ashford, Washington · 9849 days ago · 0 km deep · 12 km away
  12. 2.435 km SSE of Morton, Washington · 9842 days ago · -2 km deep · 78 km away
  13. 1.64 km NE of North Bend, Washington · 9841 days ago · 16 km deep · 78 km away
  14. 1.610 km NE of Snoqualmie, Washington · 9840 days ago · 14 km deep · 86 km away
  15. 1.51 km WNW of Lea Hill, Washington · 9840 days ago · 63 km deep · 71 km away
  16. 1.77 km SSW of Morton, Washington · 9833 days ago · 18 km deep · 66 km away
  17. 1.714 km NNE of Ashford, Washington · 9832 days ago · 9 km deep · 24 km away
  18. 1.63 km NE of Snoqualmie, Washington · 9826 days ago · 14 km deep · 80 km away
  19. 1.63 km N of Tieton, Washington · 9820 days ago · 9 km deep · 66 km away

Before

  1. 1.628 km ENE of Ashford, Washington · 9887 days ago · -3 km deep · 7 km away
  2. 1.62 km WNW of Mirrormont, Washington · 9897 days ago · 17 km deep · 77 km away
  3. 1.54 km NE of Cliffdell, Washington · 9900 days ago · -1 km deep · 47 km away
  4. 1.731 km SSE of Greenwater, Washington · 9901 days ago · -1 km deep · 11 km away
  5. 1.54 km E of Dash Point, Washington · 9902 days ago · 22 km deep · 78 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10482363. Read Fri, Oct 2, 2026, 3:01 PM UTC.