Washington earthquakes

M2.0 earthquake 9 km N of Hamilton, Washington

A magnitude 2.0 earthquake struck 9 km N of Hamilton, Washington on Mon, Jul 21, 1975, 12:16 AM PDT (07:16 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M2.3 6 km E of Marrowstone, Washington. This one was a foreshock.

Sedro-Woolley 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
2.0 (md), micro
Local time
UTC
1975-07-21 07:16:39 UTC
Depth
6.6 km (4.1 mi), shallow
Epicenter
48.607° N, 122.010° 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 1.4 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
161°
Stations used
5

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 7 in the 30 days before it.

After

  1. 1.82 km NNE of Bay View, Washington · 18679 days ago · 24 km deep · 35 km away
  2. 1.74 km NW of Oso, Washington · 18668 days ago · 8 km deep · 35 km away
  3. 1.712 km NNE of Maple Falls, Washington · 18667 days ago · 0 km deep · 47 km away
  4. 2.36 km E of Marrowstone, Washington · 18656 days ago · 24 km deep · 76 km away
  5. 2.53 km N of Kingston, Washington · 18651 days ago · 23 km deep · 94 km away
  6. 2.02 km SW of Lake Forest Park, Washington · 18641 days ago · 14 km deep · 98 km away
  7. 1.98 km S of Chilliwack, Canada · 18641 days ago · 6 km deep · 54 km away
  8. 2.03 km WSW of Woodway, Washington · 18640 days ago · 11 km deep · 96 km away
  9. 1.83 km SSE of La Conner, Washington · 18638 days ago · -1 km deep · 44 km away
  10. 2.56 km WSW of Lake Cavanaugh, Washington · 18636 days ago · 3 km deep · 34 km away
  11. 1.853 km SSE of Hope, Canada · 18636 days ago · 0 km deep · 81 km away
  12. 2.66 km WSW of Lake Cavanaugh, Washington · 18634 days ago · 7 km deep · 35 km away
  13. 2.06 km SW of Lake Cavanaugh, Washington · 18634 days ago · 11 km deep · 36 km away
  14. 2.50 km ENE of Peaceful Valley, Washington · 18634 days ago · 11 km deep · 38 km away
  15. 1.96 km WSW of Lake Cavanaugh, Washington · 18633 days ago · 9 km deep · 35 km away
  16. 1.91 km NW of Mill Creek, Washington · 18632 days ago · 24 km deep · 83 km away

Before

  1. 1.84 km SSE of Monroe, Washington · 18693 days ago · 12 km deep · 88 km away
  2. 2.22 km S of Startup, Washington · 18693 days ago · -1 km deep · 87 km away
  3. 1.56 km NE of Bryant, Washington · 18700 days ago · 11 km deep · 37 km away
  4. 2.113 km SE of Verlot, Washington · 18703 days ago · -1 km deep · 71 km away
  5. 2.02 km ESE of Duvall, Washington · 18712 days ago · 16 km deep · 97 km away
  6. 2.1Washington · 18713 days ago · 12 km deep · 71 km away
  7. 1.62 km ESE of Lake Cavanaugh, Washington · 18720 days ago · 9 km deep · 32 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10861348. Read Tue, Sep 22, 2026, 5:19 PM UTC.