Washington earthquakes

M1.5 earthquake 16 km S of Morton, Washington

A magnitude 1.5 earthquake struck 16 km S of Morton, Washington on Tue, Dec 3, 2002, 4:15 PM PST (00:15 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.4 9 km WSW of Mineral, Washington. This one was a foreshock.

Morton 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
2002-12-04 00:15:31 UTC
Depth
7.8 km (4.8 mi), shallow
Epicenter
46.415° N, 122.250° 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 0.3 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.03
Depth from
From location
Station coverage gap
48°
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 1.714 km NNE of Ashford, Washington · 8702 days ago · 9 km deep · 56 km away
  2. 2.016 km ENE of Kalama, Washington · 8701 days ago · 17 km deep · 48 km away
  3. 2.49 km WSW of Mineral, Washington · 8697 days ago · 13 km deep · 30 km away
  4. 1.622 km ENE of Ashford, Washington · 8694 days ago · -1 km deep · 61 km away
  5. 1.827 km ENE of Yacolt, Washington · 8693 days ago · 10 km deep · 49 km away
  6. 1.54 km W of Ashford, Washington · 8688 days ago · 17 km deep · 40 km away
  7. 1.732 km S of Morton, Washington · 8666 days ago · 2 km deep · 16 km away
  8. 1.823 km ENE of Ashford, Washington · 8657 days ago · -2 km deep · 61 km away
  9. 1.720 km SSE of Morton, Washington · 8650 days ago · 4 km deep · 5 km away

Before

  1. 1.72 km WSW of Deer Island, Oregon · 8702 days ago · 26 km deep · 73 km away
  2. 1.522 km WSW of Nile, Washington · 8704 days ago · -1 km deep · 88 km away
  3. 1.75 km ENE of Mineral, Washington · 8704 days ago · 9 km deep · 37 km away
  4. 1.917 km ESE of Packwood, Washington · 8708 days ago · 3 km deep · 63 km away
  5. 1.510 km E of Kalama, Washington · 8708 days ago · 15 km deep · 56 km away
  6. 1.611 km E of Kalama, Washington · 8708 days ago · 14 km deep · 56 km away
  7. 2.49 km E of Yacolt, Washington · 8711 days ago · 6 km deep · 60 km away
  8. 2.817 km SE of Carbonado, Washington · 8714 days ago · 7 km deep · 66 km away
  9. 2.137 km NNE of Amboy, Washington · 8716 days ago · 0 km deep · 24 km away
  10. 1.64 km WSW of Longview, Washington · 8718 days ago · 20 km deep · 65 km away
  11. 2.627 km ENE of Yacolt, Washington · 8731 days ago · 12 km deep · 50 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10570283. Read Thu, Oct 1, 2026, 3:25 AM UTC.