Washington earthquakes

M1.6 earthquake 38 km NNE of Amboy, Washington

A magnitude 1.6 earthquake struck 38 km NNE of Amboy, Washington on Wed, May 8, 1991, 11:32 AM PDT (18:32 UTC), -1 km (0 mi) below the surface.

A larger quake followed: M3.0 10 km E of Ashford, Washington. This one was a foreshock.

Amboy 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
1991-05-08 18:32:11 UTC
Depth
-0.7 km (-0.5 mi), shallow
Epicenter
46.203° N, 122.186° 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 0.2 km horizontally, 0.2 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
62°
Stations used
14

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 7 in the 30 days before it.

After

  1. 2.123 km NE of Ashford, Washington · 12930 days ago · -1 km deep · 83 km away
  2. 1.637 km NNE of Amboy, Washington · 12925 days ago · 3 km deep · 0 km away
  3. 3.010 km E of Ashford, Washington · 12924 days ago · 10 km deep · 66 km away
  4. 1.75 km ESE of Carbonado, Washington · 12916 days ago · 10 km deep · 98 km away
  5. 2.238 km SSE of Morton, WA · 12915 days ago · 11 km deep · 12 km away
  6. 1.737 km NNE of Amboy, Washington · 12915 days ago · -2 km deep · 1 km away
  7. 1.637 km NNE of Amboy, Washington · 12915 days ago · -2 km deep · 1 km away
  8. 1.628 km SW of White Swan, Washington · 12911 days ago · -1 km deep · 92 km away
  9. 1.637 km NNE of Amboy, Washington · 12901 days ago · -2 km deep · 1 km away
  10. 2.632 km NE of Amboy, Washington · 12890 days ago · 11 km deep · 16 km away
  11. 1.637 km NNE of Amboy, Washington · 12889 days ago · -1 km deep · 1 km away
  12. 2.122 km SSE of Greenwater, Washington · 12888 days ago · 10 km deep · 97 km away
  13. 2.623 km ENE of Ashford, Washington · 12888 days ago · -2 km deep · 81 km away
  14. 1.619 km S of Morton, Washington · 12885 days ago · 12 km deep · 21 km away
  15. 2.028 km ENE of Ashford, Washington · 12884 days ago · -1 km deep · 85 km away
  16. 2.010 km SSE of Mineral, Washington · 12882 days ago · 14 km deep · 47 km away
  17. 1.86 km WNW of Scappoose, Oregon · 12875 days ago · 16 km deep · 76 km away
  18. 1.631 km NNE of Amboy, Washington · 12874 days ago · 9 km deep · 12 km away

Before

  1. 1.937 km NNE of Amboy, Washington · 12946 days ago · -2 km deep · 1 km away
  2. 1.54 km NE of La Center, Washington · 12947 days ago · 15 km deep · 48 km away
  3. 1.633 km ESE of Packwood, Washington · 12950 days ago · -1 km deep · 73 km away
  4. 1.618 km ENE of Kalama, Washington · 12955 days ago · 15 km deep · 37 km away
  5. 1.71 km SSW of Salmon Creek, Washington · 12960 days ago · 20 km deep · 67 km away
  6. 1.520 km NNW of Packwood, Washington · 12960 days ago · -1 km deep · 73 km away
  7. 2.013 km SSW of Alder, Washington · 12961 days ago · 16 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10275948. Read Sat, Oct 3, 2026, 12:40 PM UTC.