Washington earthquakes

M1.5 earthquake 6 km SE of Mossyrock, Washington

A magnitude 1.5 earthquake struck 6 km SE of Mossyrock, Washington on Sun, Sep 22, 2002, 9:31 PM PDT (04:31 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M2.8 17 km SE of Carbonado, Washington. This one was a foreshock.

Mossyrock 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), micro
Local time
UTC
2002-09-23 04:31:33 UTC
Depth
21.4 km (13.3 mi), shallow
Epicenter
46.495° N, 122.413° 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
±0.03
Depth from
From location
Station coverage gap
84°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 1.618 km SSE of Carbonado, Washington · 8770 days ago · 11 km deep · 60 km away
  2. 1.912 km NW of Amboy, Washington · 8761 days ago · 13 km deep · 59 km away
  3. 1.620 km ENE of Ashford, Washington · 8756 days ago · 8 km deep · 61 km away
  4. 1.63 km WSW of Deer Island, Oregon · 8749 days ago · 25 km deep · 74 km away
  5. 2.0Washington · 8749 days ago · 15 km deep · 65 km away
  6. 1.83 km WSW of Deer Island, Oregon · 8748 days ago · 25 km deep · 74 km away
  7. 1.538 km NNE of Amboy, Washington · 8742 days ago · 0 km deep · 37 km away
  8. 1.54 km WSW of Deer Island, Oregon · 8741 days ago · 23 km deep · 74 km away
  9. 1.934 km N of Amboy, Washington · 8740 days ago · 7 km deep · 31 km away
  10. 1.533 km SSW of Packwood, Washington · 8737 days ago · 9 km deep · 47 km away
  11. 1.5Washington-Oregon border region · 8736 days ago · 17 km deep · 85 km away
  12. 2.627 km ENE of Yacolt, Washington · 8731 days ago · 12 km deep · 62 km away
  13. 1.64 km WSW of Longview, Washington · 8718 days ago · 20 km deep · 60 km away
  14. 2.137 km NNE of Amboy, Washington · 8716 days ago · 0 km deep · 37 km away
  15. 2.817 km SE of Carbonado, Washington · 8714 days ago · 7 km deep · 64 km away

Before

  1. 2.321 km ENE of Ashford, Washington · 8775 days ago · -2 km deep · 62 km away
  2. 2.28 km SSE of Carbonado, Washington · 8781 days ago · 14 km deep · 66 km away
  3. 1.716 km NNE of Ashford, Washington · 8788 days ago · 12 km deep · 56 km away
  4. 2.24 km ESE of Longbranch, Washington · 8800 days ago · 54 km deep · 81 km away
  5. 1.63 km SSW of Des Moines, Washington · 8800 days ago · 21 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10566743. Read Thu, Oct 1, 2026, 1:35 AM UTC.