Washington earthquakes

M1.7 earthquake 10 km N of Index, Washington

A magnitude 1.7 earthquake struck 10 km N of Index, Washington on Fri, May 16, 1980, 3:54 PM PDT (22:54 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M1.8 16 km WNW of Granite Falls, 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), micro
Local time
UTC
1980-05-16 22:54:08 UTC
Depth
20.4 km (12.7 mi), shallow
Epicenter
47.911° N, 121.544° 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 3.7 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
243°, poorly surrounded by stations
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: 18 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 1.816 km WNW of Granite Falls, Washington · 16915 days ago · 8 km deep · 84 km away
  2. 1.50 km ENE of Monroe, Washington · 16906 days ago · 25 km deep · 32 km away
  3. 1.73 km SW of Mercer Island, Washington · 16893 days ago · -1 km deep · 66 km away
  4. 3.73 km SW of Mercer Island, Washington · 16893 days ago · -1 km deep · 67 km away
  5. 3.33 km SSW of Mercer Island, Washington · 16893 days ago · -1 km deep · 67 km away
  6. 1.64 km N of Bryn Mawr-Skyway, Washington · 16893 days ago · -1 km deep · 67 km away
  7. 1.72 km E of Lake Marcel-Stillwater, Washington · 16893 days ago · 7 km deep · 35 km away
  8. 1.73 km SSW of Mercer Island, Washington · 16893 days ago · -1 km deep · 67 km away
  9. 1.57 km WSW of Lake Cavanaugh, Washington · 16885 days ago · 10 km deep · 62 km away
  10. 1.712 km ESE of Ravensdale, Washington · 16883 days ago · 18 km deep · 70 km away
  11. 1.75 km S of La Conner, Washington · 16883 days ago · 8 km deep · 86 km away
  12. 1.89 km SSW of Wilderness Rim, Washington · 16883 days ago · 1 km deep · 64 km away
  13. 1.63 km SSW of Fall City, Washington · 16882 days ago · 18 km deep · 49 km away
  14. 2.25 km WSW of Lake Cavanaugh, Washington · 16875 days ago · 11 km deep · 60 km away
  15. 1.55 km WSW of Lake Cavanaugh, Washington · 16875 days ago · 10 km deep · 60 km away
  16. 1.85 km WSW of Lake Cavanaugh, Washington · 16875 days ago · 11 km deep · 60 km away
  17. 2.85 km WSW of Lake Cavanaugh, Washington · 16875 days ago · 13 km deep · 60 km away
  18. 1.714 km SSW of Concrete, Washington · 16873 days ago · 2 km deep · 61 km away

Before

  1. 3.02 km E of Canterwood, Washington · 16942 days ago · 19 km deep · 96 km away
  2. 2.00 km NE of Carnation, Washington · 16943 days ago · 25 km deep · 40 km away
  3. 2.03 km S of Black Diamond, Washington · 16944 days ago · 13 km deep · 78 km away
  4. 3.72 km E of Canterwood, Washington · 16951 days ago · 20 km deep · 96 km away
  5. 1.53 km NW of Bainbridge Island, Washington · 16953 days ago · 25 km deep · 82 km away
  6. 2.321 km WNW of Entiat, Washington · 16953 days ago · 6 km deep · 82 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10083308. Read Wed, Sep 23, 2026, 9:56 PM UTC.