Washington earthquakes

M1.7 earthquake 12 km ESE of Mansfield, Washington

A magnitude 1.7 earthquake struck 12 km ESE of Mansfield, Washington on Wed, Mar 17, 1976, 7:30 PM PST (03:30 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.1 7 km N of Waterville, 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
1.7 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
1976-03-18 03:30:03 UTC
Depth
-0.2 km (-0.1 mi), shallow
Epicenter
47.773° N, 119.479° 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 0.4 km horizontally
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
89°
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 1.512 km ESE of Mansfield, Washington · 18460 days ago · 0 km deep · 1 km away
  2. 1.94 km E of Entiat, Washington · 18449 days ago · 8 km deep · 52 km away
  3. 1.615 km S of Leavenworth, Washington · 18438 days ago · 5 km deep · 97 km away
  4. 1.81 km SE of North Omak, Washington · 18432 days ago · 0 km deep · 74 km away
  5. 1.59 km N of Chelan, Washington · 18430 days ago · 0 km deep · 45 km away
  6. 2.16 km S of Granite Falls, Washington · 18425 days ago · 0 km deep · 55 km away
  7. 1.912 km W of Quincy, Washington · 18410 days ago · 0 km deep · 72 km away
  8. 2.24 km SSE of Entiat, Washington · 18404 days ago · 9 km deep · 54 km away
  9. 1.617 km ENE of George, Washington · 18404 days ago · 12 km deep · 73 km away
  10. 1.818 km ENE of George, Washington · 18404 days ago · 16 km deep · 71 km away
  11. 1.817 km ENE of George, Washington · 18404 days ago · 4 km deep · 72 km away
  12. 3.17 km N of Waterville, Washington · 18402 days ago · 7 km deep · 44 km away
  13. 2.112 km NW of Entiat, Washington · 18400 days ago · 0 km deep · 64 km away

Before

  1. 1.84 km ENE of Royal City, Washington · 18471 days ago · 16 km deep · 96 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10840923. Read Fri, Oct 2, 2026, 8:32 AM UTC.