Washington earthquakes

M1.5 earthquake 14 km SSW of Alder, Washington

A magnitude 1.5 earthquake struck 14 km SSW of Alder, Washington on Mon, Apr 27, 2026, 12:39 AM PDT (07:39 UTC), 17 km (11 mi) below the surface.

A larger quake followed: M2.8 4 km W of Wauna, 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, local (Richter)), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
2026-04-27 07:39:05 UTC
Depth
17.3 km (10.7 mi), shallow
Epicenter
46.683° N, 122.364° 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 0.2 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
25°
Stations used
66

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 1.95 km NE of Hobart, Washington · 144 days ago · 19 km deep · 93 km away
  2. 1.94 km SW of Packwood, Washington · 144 days ago · 10 km deep · 51 km away
  3. 1.737 km NNE of Amboy, Washington · 136 days ago · 0 km deep · 55 km away
  4. 1.87 km SSE of Mossyrock, Washington · 131 days ago · 19 km deep · 24 km away
  5. 2.84 km W of Wauna, Washington · 127 days ago · 26 km deep · 81 km away · felt by 64
  6. 2.010 km ESE of Ashford, Washington · 119 days ago · 12 km deep · 35 km away
  7. 1.63 km S of Grapeview, Washington · 119 days ago · 25 km deep · 77 km away
  8. 1.612 km SW of Mossyrock, Washington · 111 days ago · 15 km deep · 31 km away
  9. 1.632 km N of Amboy, Washington · 111 days ago · 9 km deep · 54 km away
  10. 1.532 km N of Amboy, Washington · 109 days ago · 9 km deep · 54 km away
  11. 2.05 km WSW of Crocker, Washington · 104 days ago · 9 km deep · 44 km away · felt by 6
  12. 1.518 km SW of Nile, Washington · 103 days ago · 8 km deep · 95 km away
  13. 1.71 km ESE of Tacoma, Washington · 103 days ago · 27 km deep · 63 km away
  14. 2.03 km NNE of Winlock, Washington · 101 days ago · 0 km deep · 47 km away
  15. 1.65 km W of Tumwater, Washington · 101 days ago · 0 km deep · 59 km away
  16. 1.95 km WNW of White Center, Washington · 100 days ago · 29 km deep · 95 km away

Before

  1. 1.60 km S of Lakeland South, Washington · 162 days ago · 19 km deep · 66 km away
  2. 1.75 km SSE of Yacolt, Washington · 162 days ago · -1 km deep · 95 km away
  3. 1.64 km SSW of Shelton, Washington · 162 days ago · 16 km deep · 81 km away
  4. 1.921 km SSE of Mossyrock, Washington · 166 days ago · 17 km deep · 36 km away
  5. 1.66 km NNW of Clatskanie, Oregon · 168 days ago · 48 km deep · 88 km away
  6. 2.01 km SE of Fairwood, Washington · 168 days ago · 10 km deep · 86 km away · felt by 1
  7. 1.74 km NW of Dash Point, Washington · 172 days ago · 20 km deep · 75 km away
  8. 2.813 km NW of Cliffdell, Washington · 173 days ago · 9 km deep · 96 km away · felt by 1
  9. 1.73 km E of Mirrormont, Washington · 173 days ago · 18 km deep · 92 km away
  10. 1.60 km SSE of Kapowsin, Washington · 174 days ago · 1 km deep · 35 km away
  11. 1.75 km NE of Hobart, Washington · 175 days ago · 19 km deep · 93 km away
  12. 2.25 km E of Mirrormont, Washington · 175 days ago · 20 km deep · 93 km away
  13. 1.725 km S of Morton, Washington · 176 days ago · 7 km deep · 41 km away
  14. 2.35 km SW of Packwood, Washington · 182 days ago · 9 km deep · 50 km away · felt by 4

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw62240167. Read Thu, Oct 1, 2026, 1:17 PM UTC.