Washington earthquakes

M1.8 earthquake 21 km SE of Carbonado, Washington

A magnitude 1.8 earthquake struck 21 km SE of Carbonado, Washington on Wed, Nov 30, 1977, 11:02 PM PST (07:02 UTC), 17 km (10 mi) below the surface.

A larger quake followed: M2.0 9 km ENE of Carnation, Washington. This one was a foreshock.

Carbonado 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
1.8 (md), micro
Local time
UTC
1977-12-01 07:02:14 UTC
Depth
16.7 km (10.4 mi), shallow
Epicenter
46.965° N, 121.822° 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 0.7 km horizontally, 1.0 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
140°
Stations used
9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 1.70 km NNW of Clyde Hill, Washington · 17821 days ago · 21 km deep · 80 km away
  2. 1.54 km NW of Black Diamond, Washington · 17810 days ago · 12 km deep · 45 km away
  3. 1.54 km ESE of Indianola, Washington · 17810 days ago · 15 km deep · 99 km away
  4. 1.60 km N of Southworth, Washington · 17805 days ago · 18 km deep · 80 km away
  5. 2.09 km ENE of Carnation, Washington · 17801 days ago · 16 km deep · 79 km away
  6. 1.62 km NW of Maple Valley, Washington · 17798 days ago · 17 km deep · 53 km away
  7. 1.95 km SE of Monroe, Washington · 17797 days ago · 9 km deep · 95 km away
  8. 1.53 km WSW of Wilderness Rim, Washington · 17770 days ago · 19 km deep · 53 km away

Before

  1. 2.118 km WSW of Nile, Washington · 17827 days ago · 1 km deep · 57 km away
  2. 2.124 km N of Packwood, Washington · 17829 days ago · 5 km deep · 19 km away
  3. 1.91 km NE of Maple Heights-Lake Desire, Washington · 17833 days ago · 16 km deep · 58 km away
  4. 2.17 km SE of Mossyrock, Washington · 17838 days ago · 16 km deep · 70 km away
  5. 1.92 km SW of Ashford, Washington · 17845 days ago · -1 km deep · 30 km away
  6. 1.92 km WSW of Ashford, Washington · 17845 days ago · 0 km deep · 30 km away
  7. 2.28 km NNW of Thorp, Washington · 17850 days ago · 4 km deep · 85 km away
  8. 1.62 km W of Burley, Washington · 17852 days ago · 21 km deep · 81 km away
  9. 2.09 km ENE of Thorp, Washington · 17855 days ago · 10 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10845293. Read Tue, Sep 22, 2026, 9:15 AM UTC.