Washington earthquakes

M1.9 earthquake 5 km ESE of Alger, Washington

A magnitude 1.9 earthquake struck 5 km ESE of Alger, Washington on Wed, Nov 7, 1973, 3:45 AM PST (11:45 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M2.0 2 km SSE of Coupeville, 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
1.9 (md), micro
Local time
UTC
1973-11-07 11:45:15 UTC
Depth
14.0 km (8.7 mi), shallow
Epicenter
48.593° N, 122.277° 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 1.3 km horizontally, 3.1 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
129°
Stations used
4

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 2.02 km SSE of Coupeville, Washington · 19311 days ago · 32 km deep · 52 km away
  2. 1.813 km NNE of Concrete, Washington · 19310 days ago · -1 km deep · 44 km away
  3. 2.78 km NW of Friday Harbor, Washington · 19307 days ago · 7 km deep · 59 km away
  4. 1.610 km NNW of Anacortes, Washington · 19307 days ago · 13 km deep · 27 km away
  5. 2.410 km ESE of Deming, Washington · 19301 days ago · 3 km deep · 28 km away
  6. 1.87 km SW of Sultan, Washington · 19291 days ago · 8 km deep · 92 km away
  7. 2.47 km SE of Quilcene, Washington · 19282 days ago · 20 km deep · 100 km away
  8. 1.61 km NW of Duvall, Washington · 19282 days ago · 23 km deep · 96 km away
  9. 1.93 km SSW of Clinton, Washington · 19277 days ago · 23 km deep · 72 km away
  10. 2.83 km SW of Marrowstone, Washington · 19262 days ago · 45 km deep · 71 km away
  11. 1.75 km NNE of Startup, Washington · 19256 days ago · 7 km deep · 86 km away

Before

  1. 2.10 km SW of Oak Harbor, Washington · 19314 days ago · 16 km deep · 44 km away
  2. 1.64 km S of Lake Cavanaugh, Washington · 19338 days ago · 13 km deep · 39 km away
  3. 1.66 km SW of Woodway, Washington · 19342 days ago · 21 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10857708. Read Thu, Sep 24, 2026, 8:37 AM UTC.