Washington earthquakes

M2.4 earthquake 5 km S of Acme, Washington

A magnitude 2.4 earthquake struck 5 km S of Acme, Washington on Sun, Apr 23, 1972, 8:09 PM PST (04:09 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M3.1 2 km NW of Orcas, Washington. This one was a foreshock.

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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
1972-04-24 04:09:59 UTC
Depth
14.1 km (8.7 mi), shallow
Epicenter
48.671° N, 122.207° 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 1.8 km horizontally, 2.4 km in depth
Magnitude uncertainty
±0.07
Depth from
Operator assigned
Station coverage gap
301°, poorly surrounded by stations
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 1.96 km NE of Lofall, Washington · 19871 days ago · 22 km deep · 95 km away
  2. 2.43 km WSW of Mount Vernon, Washington · 19869 days ago · 25 km deep · 32 km away
  3. 2.27 km N of Burlington, Washington · 19868 days ago · -1 km deep · 18 km away
  4. 1.84 km NE of Lake McMurray, Washington · 19865 days ago · 18 km deep · 37 km away
  5. 3.12 km NW of Orcas, Washington · 19850 days ago · 23 km deep · 56 km away
  6. 2.94 km WNW of Alger, Washington · 19848 days ago · 18 km deep · 15 km away
  7. 2.85 km NNW of Alger, Washington · 19847 days ago · 14 km deep · 13 km away
  8. 2.05 km NE of Lofall, Washington · 19847 days ago · 22 km deep · 96 km away
  9. 3.226 km SE of Darrington, Washington · 19817 days ago · 2 km deep · 90 km away

Before

  1. 2.86 km ENE of Acme, Washington · 19879 days ago · -1 km deep · 10 km away
  2. 1.81 km NW of Monroe, Washington · 19879 days ago · 18 km deep · 91 km away
  3. 1.95 km S of Port Ludlow, Washington · 19879 days ago · 30 km deep · 95 km away
  4. 1.62 km SE of Snohomish, Washington · 19894 days ago · 19 km deep · 87 km away
  5. 2.32 km SE of Snohomish, Washington · 19894 days ago · 24 km deep · 87 km away
  6. 3.02 km SSE of Snohomish, Washington · 19894 days ago · 22 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10853018. Read Tue, Sep 22, 2026, 6:16 AM UTC.