Washington earthquakes

M1.5 earthquake 5 km SSW of Morton, Washington

A magnitude 1.5 earthquake struck 5 km SSW of Morton, Washington on Sun, Sep 20, 2026, 3:53 PM PDT (22:53 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M1.7 18 km N of Amboy, 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 (ml), micro
Local time
UTC
2026-09-20 22:53:10 UTC
Depth
10.1 km (6.2 mi), shallow
Epicenter
46.515° N, 122.317° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS. If you felt it, tell the USGS: every report sharpens the shaking map.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.2 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
73°
Stations used
28

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 2 since this one and 14 in the 30 days before it.

After

  1. 1.718 km N of Amboy, Washington · 27 hr ago · 10 km deep · 50 km away
  2. 1.80 km SSE of Kapowsin, Washington · 16 min ago · 1 km deep · 52 km away

Before

  1. 1.537 km NNE of Amboy, Washington · 3 days ago · -2 km deep · 36 km away
  2. 2.725 km ENE of Yacolt, Washington · 4 days ago · 9 km deep · 65 km away · felt by 1
  3. 1.511 km NE of Ashford, Washington · 5 days ago · 5 km deep · 46 km away
  4. 1.720 km E of Castle Rock, Washington · 6 days ago · 17 km deep · 39 km away
  5. 1.57 km NNE of Ashford, Washington · 10 days ago · 8 km deep · 42 km away
  6. 1.617 km SSW of Nile, Washington · 14 days ago · 9 km deep · 98 km away
  7. 3.820 km E of Castle Rock, Washington · 18 days ago · 18 km deep · 39 km away · felt by 1,025
  8. 1.632 km N of Amboy, Washington · 20 days ago · 10 km deep · 35 km away
  9. 1.68 km E of Ashford, Washington · 23 days ago · -1 km deep · 41 km away
  10. 1.520 km S of Packwood, Washington · 24 days ago · 4 km deep · 54 km away
  11. 1.66 km NE of Rochester, Washington · 27 days ago · 6 km deep · 68 km away
  12. 1.827 km N of Amboy, Washington · 29 days ago · 6 km deep · 42 km away
  13. 1.78 km E of Ashford, Washington · 31 days ago · 2 km deep · 41 km away
  14. 2.48 km E of Ashford, Washington · 32 days ago · 4 km deep · 41 km away · felt by 3

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw714106471. Read Tue, Sep 22, 2026, 11:31 PM UTC.