Washington earthquakes

M1.0 earthquake 22 km S of Morton, Washington

A magnitude 1.0 earthquake struck 22 km S of Morton, Washington on Tue, Sep 15, 2026, 8:15 AM PDT (15:15 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M1.7 20 km E of Castle Rock, 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
1.0 (ml), micro
Local time
UTC
2026-09-15 15:15:37 UTC
Depth
14.1 km (8.8 mi), shallow
Epicenter
46.354° N, 122.297° 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 0.3 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.03
Depth from
From location
Station coverage gap
64°
Stations used
30

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 7 since this one and 11 in the 30 days before it.

After

  1. 1.720 km E of Castle Rock, Washington · 6 days ago · 17 km deep · 29 km away
  2. 2.010 km SSE of Scappoose, Oregon · 5 days ago · 23 km deep · 87 km away
  3. 1.511 km NE of Ashford, Washington · 5 days ago · 5 km deep · 60 km away
  4. 2.725 km ENE of Yacolt, Washington · 4 days ago · 9 km deep · 48 km away
  5. 1.537 km NNE of Amboy, Washington · 3 days ago · -2 km deep · 19 km away
  6. 1.55 km SSW of Morton, Washington · 41 hr ago · 10 km deep · 18 km away
  7. 1.718 km N of Amboy, Washington · 19 hr ago · 10 km deep · 33 km away

Before

  1. 1.57 km NNE of Ashford, Washington · 10 days ago · 8 km deep · 57 km away
  2. 3.820 km E of Castle Rock, Washington · 17 days ago · 18 km deep · 29 km away · felt by 1,025
  3. 1.632 km N of Amboy, Washington · 19 days ago · 10 km deep · 18 km away
  4. 1.68 km E of Ashford, Washington · 23 days ago · -1 km deep · 53 km away
  5. 1.520 km S of Packwood, Washington · 24 days ago · 4 km deep · 52 km away
  6. 1.66 km NE of Rochester, Washington · 27 days ago · 6 km deep · 81 km away
  7. 1.827 km N of Amboy, Washington · 28 days ago · 6 km deep · 26 km away
  8. 1.78 km E of Ashford, Washington · 31 days ago · 2 km deep · 53 km away
  9. 2.48 km E of Ashford, Washington · 31 days ago · 4 km deep · 53 km away · felt by 3
  10. 1.68 km SW of Vernonia, Oregon · 33 days ago · 0 km deep · 97 km away
  11. 2.337 km NNE of Amboy, Washington · 37 days ago · -2 km deep · 19 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw714102671. Read Tue, Sep 22, 2026, 3:25 PM UTC.