Washington earthquakes

M1.6 earthquake 22 km NE of Amboy, Washington

A magnitude 1.6 earthquake struck 22 km NE of Amboy, Washington on Sun, Apr 21, 2002, 6:56 AM PDT (13:56 UTC), -1 km (0 mi) below the surface.

A larger quake followed: M2.8 5 km ENE of Government Camp, Oregon. 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), micro
Local time
UTC
2002-04-21 13:56:49 UTC
Depth
-0.6 km (-0.3 mi), shallow
Epicenter
46.069° N, 122.262° 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, 0.5 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
142°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 29 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.518 km SSE of Carbonado, Washington · 8927 days ago · 13 km deep · 99 km away
  2. 1.95 km ENE of Government Camp, Oregon · 8926 days ago · 1 km deep · 94 km away
  3. 2.15 km ENE of Government Camp, Oregon · 8914 days ago · 0 km deep · 94 km away
  4. 2.55 km ENE of Government Camp, Oregon · 8914 days ago · 4 km deep · 94 km away
  5. 1.65 km ENE of Government Camp, Oregon · 8913 days ago · 6 km deep · 94 km away
  6. 2.85 km ENE of Government Camp, Oregon · 8913 days ago · 4 km deep · 93 km away
  7. 1.55 km ENE of Government Camp, Oregon · 8913 days ago · 6 km deep · 93 km away
  8. 2.55 km ENE of Government Camp, Oregon · 8913 days ago · 4 km deep · 93 km away
  9. 1.56 km ENE of Government Camp, Oregon · 8913 days ago · 4 km deep · 94 km away
  10. 2.05 km SE of Mossyrock, Washington · 8910 days ago · 18 km deep · 49 km away
  11. 1.63 km NE of Amboy, Washington · 8908 days ago · 9 km deep · 19 km away
  12. 2.128 km ESE of Packwood, Washington · 8907 days ago · 1 km deep · 84 km away
  13. 1.720 km SSE of Mossyrock, Washington · 8907 days ago · 6 km deep · 34 km away
  14. 1.838 km NNE of Amboy, Washington · 8905 days ago · 2 km deep · 16 km away
  15. 1.938 km NNE of Amboy, Washington · 8897 days ago · 0 km deep · 16 km away
  16. 1.66 km ENE of Government Camp, Oregon · 8896 days ago · 1 km deep · 94 km away
  17. 1.5Washington-Oregon border region · 8896 days ago · 4 km deep · 94 km away
  18. 2.06 km ENE of Government Camp, Oregon · 8895 days ago · 2 km deep · 93 km away
  19. 2.417 km SSE of Carbonado, Washington · 8892 days ago · 11 km deep · 99 km away
  20. 1.67 km NE of Government Camp, Oregon · 8891 days ago · 4 km deep · 91 km away
  21. 1.55 km ENE of Government Camp, Oregon · 8885 days ago · 6 km deep · 94 km away
  22. 1.56 km ENE of Government Camp, Oregon · 8885 days ago · 4 km deep · 94 km away
  23. 2.117 km SSE of Carbonado, Washington · 8885 days ago · 12 km deep · 99 km away
  24. 2.217 km SSE of Carbonado, Washington · 8885 days ago · 11 km deep · 99 km away
  25. 1.624 km S of Morton, Washington · 8883 days ago · 4 km deep · 30 km away
  26. 1.726 km S of Morton, Washington · 8878 days ago · 2 km deep · 28 km away
  27. 1.531 km SW of Tampico, Washington · 8878 days ago · 9 km deep · 90 km away
  28. 2.110 km WSW of Scappoose, Oregon · 8876 days ago · 17 km deep · 70 km away
  29. 1.72 km SW of Morton, Washington · 8874 days ago · 10 km deep · 53 km away

Before

  1. 1.829 km ESE of Packwood, Washington · 8935 days ago · 5 km deep · 85 km away
  2. 2.114 km NNE of Ashford, Washington · 8939 days ago · 9 km deep · 93 km away
  3. 2.14 km NNE of Cedar Mill, Oregon · 8943 days ago · 16 km deep · 70 km away
  4. 1.58 km S of Morton, Washington · 8953 days ago · 18 km deep · 46 km away
  5. 1.710 km S of Morton, Washington · 8955 days ago · 15 km deep · 44 km away
  6. 2.12 km NW of Mill Plain, Washington · 8957 days ago · 18 km deep · 49 km away
  7. 1.614 km NE of Ashford, Washington · 8958 days ago · 11 km deep · 93 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10555408. Read Wed, Sep 30, 2026, 6:30 PM UTC.