Washington earthquakes

M2.4 earthquake 11 km SSW of Alder, Washington

A magnitude 2.4 earthquake struck 11 km SSW of Alder, Washington on Mon, Feb 14, 1977, 12:40 PM PST (20:40 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M2.9 6 km SW of Morton, 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
2.4 (md), micro
Local time
UTC
1977-02-14 20:40:38 UTC
Depth
14.7 km (9.1 mi), shallow
Epicenter
46.705° N, 122.338° 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
±0.10
Depth from
From location
Station coverage gap
77°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 27 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 1.91 km WNW of SeaTac, Washington · 18113 days ago · 23 km deep · 83 km away
  2. 2.412 km N of Ashford, Washington · 18112 days ago · 1 km deep · 31 km away
  3. 2.96 km SW of Morton, Washington · 18106 days ago · 20 km deep · 22 km away
  4. 2.94 km SW of Morton, Washington · 18106 days ago · 22 km deep · 20 km away
  5. 2.315 km WSW of Greenwater, Washington · 18098 days ago · 8 km deep · 58 km away
  6. 2.54 km WSW of Onalaska, Washington · 18097 days ago · 28 km deep · 37 km away
  7. 2.6Puget Sound region, Washington · 18096 days ago · 21 km deep · 70 km away
  8. 2.44 km ESE of Hobart, Washington · 18091 days ago · 12 km deep · 85 km away
  9. 1.71 km SSW of Federal Way, Washington · 18090 days ago · 20 km deep · 67 km away
  10. 2.26 km E of Hobart, Washington · 18089 days ago · 13 km deep · 86 km away
  11. 1.76 km SSE of Wilderness Rim, Washington · 18089 days ago · 26 km deep · 89 km away
  12. 2.1Puget Sound region, Washington · 18088 days ago · 64 km deep · 70 km away
  13. 2.12 km ESE of Issaquah, Washington · 18086 days ago · 31 km deep · 94 km away
  14. 1.65 km WNW of White Center, Washington · 18086 days ago · 21 km deep · 93 km away
  15. 2.316 km SE of Carbonado, Washington · 18084 days ago · 16 km deep · 45 km away
  16. 2.12 km SSE of Dash Point, Washington · 18081 days ago · 14 km deep · 67 km away
  17. 1.9Puget Sound region, Washington · 18080 days ago · 25 km deep · 71 km away
  18. 2.312 km SW of Mossyrock, Washington · 18078 days ago · -1 km deep · 34 km away
  19. 2.33 km NNE of Bonney Lake, Washington · 18077 days ago · 8 km deep · 57 km away
  20. 2.82 km N of Bonney Lake, Washington · 18077 days ago · 13 km deep · 57 km away
  21. 2.02 km SSW of Bonney Lake, Washington · 18077 days ago · 25 km deep · 51 km away
  22. 2.24 km ENE of Bonney Lake, WA · 18070 days ago · 24 km deep · 57 km away
  23. 2.42 km NNE of Bonney Lake, Washington · 18068 days ago · 18 km deep · 57 km away
  24. 2.2Washington · 18066 days ago · 19 km deep · 77 km away
  25. 2.1Washington · 18065 days ago · 17 km deep · 86 km away
  26. 1.94 km NE of Bonney Lake, Washington · 18061 days ago · 24 km deep · 57 km away
  27. 2.04 km N of White Center, Washington · 18060 days ago · 2 km deep · 95 km away

Before

  1. 2.110 km ENE of Kalama, Washington · 18120 days ago · 0 km deep · 78 km away
  2. 2.510 km E of Kalama, Washington · 18120 days ago · 16 km deep · 81 km away
  3. 1.92 km SSE of Issaquah, Washington · 18123 days ago · -1 km deep · 93 km away
  4. 2.115 km SSE of Ashford, Washington · 18131 days ago · 42 km deep · 32 km away
  5. 1.52 km W of White Center, Washington · 18131 days ago · 22 km deep · 90 km away
  6. 1.98 km ESE of Hobart, Washington · 18135 days ago · 4 km deep · 83 km away
  7. 1.94 km SSE of Seattle, Washington · 18138 days ago · 18 km deep · 96 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10843183. Read Tue, Sep 22, 2026, 10:39 AM UTC.