Washington earthquakes

M1.5 earthquake 1 km WNW of Lea Hill, Washington

A magnitude 1.5 earthquake struck 1 km WNW of Lea Hill, Washington on Sun, Oct 24, 1999, 6:33 AM PDT (13:33 UTC), 63 km (39 mi) below the surface.

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

Lea Hill 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, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1999-10-24 13:33:29 UTC
Depth
63.3 km (39.3 mi), shallow
Epicenter
47.329° N, 122.197° 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 0.6 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
57°
Stations used
42

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 12 in the 30 days before it.

After

  1. 1.77 km SSW of Morton, Washington · 9834 days ago · 18 km deep · 93 km away
  2. 1.714 km NNE of Ashford, Washington · 9833 days ago · 9 km deep · 55 km away
  3. 1.63 km NE of Snoqualmie, Washington · 9826 days ago · 14 km deep · 39 km away
  4. 2.52 km SW of Monroe North, Washington · 9817 days ago · 19 km deep · 62 km away
  5. 1.826 km NNE of Index, Washington · 9816 days ago · 5 km deep · 99 km away
  6. 2.06 km SSE of Vashon, Washington · 9805 days ago · 18 km deep · 19 km away
  7. 1.93 km ENE of Monroe North, Washington · 9800 days ago · 16 km deep · 66 km away
  8. 2.113 km W of Greenwater, Washington · 9797 days ago · 14 km deep · 34 km away
  9. 2.2Washington · 9783 days ago · 17 km deep · 26 km away
  10. 1.92 km NNE of Bonney Lake, Washington · 9782 days ago · 14 km deep · 15 km away

Before

  1. 1.610 km NE of Snoqualmie, Washington · 9840 days ago · 14 km deep · 46 km away
  2. 1.64 km NE of North Bend, Washington · 9841 days ago · 16 km deep · 41 km away
  3. 1.63 km NE of Woods Creek, Washington · 9843 days ago · -1 km deep · 68 km away
  4. 1.71 km NNE of Bothell, Washington · 9846 days ago · 27 km deep · 50 km away
  5. 1.721 km ENE of Ashford, Washington · 9850 days ago · 0 km deep · 63 km away
  6. 2.120 km ENE of Ashford, Washington · 9854 days ago · -2 km deep · 63 km away
  7. 1.62 km N of Gorst, Washington · 9860 days ago · -1 km deep · 45 km away
  8. 2.512 km WSW of Packwood, Washington · 9861 days ago · 3 km deep · 92 km away
  9. 1.511 km E of Enumclaw, Washington · 9864 days ago · 2 km deep · 29 km away
  10. 1.727 km ENE of Ashford, Washington · 9864 days ago · -2 km deep · 65 km away
  11. 2.01 km ENE of Bellevue, Washington · 9869 days ago · 6 km deep · 32 km away
  12. 2.224 km ENE of Packwood, Washington · 9870 days ago · 5 km deep · 95 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10489778. Read Fri, Oct 2, 2026, 9:23 PM UTC.