Washington earthquakes

M1.6 earthquake 4 km NE of North Bend, Washington

A magnitude 1.6 earthquake struck 4 km NE of North Bend, Washington on Sat, Oct 23, 1999, 4:20 PM PDT (23:20 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M2.5 2 km SW of Monroe North, Washington. This one was a foreshock.

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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), micro
Local time
UTC
1999-10-23 23:20:01 UTC
Depth
16.0 km (9.9 mi), shallow
Epicenter
47.529° N, 121.744° 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
±0.06
Depth from
From location
Station coverage gap
47°
Stations used
35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 1.610 km NE of Snoqualmie, Washington · 9837 days ago · 14 km deep · 9 km away
  2. 1.51 km WNW of Lea Hill, Washington · 9837 days ago · 63 km deep · 41 km away
  3. 1.714 km NNE of Ashford, Washington · 9829 days ago · 9 km deep · 75 km away
  4. 1.63 km NE of Snoqualmie, Washington · 9822 days ago · 14 km deep · 4 km away
  5. 2.52 km SW of Monroe North, Washington · 9813 days ago · 19 km deep · 42 km away
  6. 1.826 km NNE of Index, Washington · 9812 days ago · 5 km deep · 62 km away
  7. 2.06 km SSE of Vashon, Washington · 9801 days ago · 18 km deep · 54 km away
  8. 1.93 km ENE of Monroe North, Washington · 9796 days ago · 16 km deep · 44 km away
  9. 2.113 km W of Greenwater, Washington · 9793 days ago · 14 km deep · 41 km away
  10. 2.2Washington · 9780 days ago · 17 km deep · 42 km away
  11. 1.92 km NNE of Bonney Lake, Washington · 9778 days ago · 14 km deep · 49 km away

Before

  1. 1.63 km NE of Woods Creek, Washington · 9839 days ago · -1 km deep · 42 km away
  2. 1.71 km NNE of Bothell, Washington · 9842 days ago · 27 km deep · 44 km away
  3. 1.721 km ENE of Ashford, Washington · 9846 days ago · 0 km deep · 77 km away
  4. 2.120 km ENE of Ashford, Washington · 9850 days ago · -2 km deep · 77 km away
  5. 1.610 km N of Thorp, Washington · 9850 days ago · 3 km deep · 91 km away
  6. 1.62 km N of Gorst, Washington · 9856 days ago · -1 km deep · 72 km away
  7. 1.511 km E of Enumclaw, Washington · 9860 days ago · 2 km deep · 35 km away
  8. 1.727 km ENE of Ashford, Washington · 9861 days ago · -2 km deep · 75 km away
  9. 2.01 km ENE of Bellevue, Washington · 9865 days ago · 6 km deep · 34 km away
  10. 2.224 km ENE of Packwood, Washington · 9867 days ago · 5 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10489413. Read Tue, Sep 29, 2026, 6:20 AM UTC.