Washington earthquakes

M1.8 earthquake 18 km SE of Carbonado, Washington

A magnitude 1.8 earthquake struck 18 km SE of Carbonado, Washington on Mon, Apr 10, 1978, 11:43 AM PST (19:43 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M2.2 3 km WSW of Artondale, 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.8 (md), micro
Local time
UTC
1978-04-10 19:43:27 UTC
Depth
19.5 km (12.1 mi), shallow
Epicenter
46.953° N, 121.899° 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 1.6 km horizontally, 2.6 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
82°
Stations used
8

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 8 in the 30 days before it.

After

  1. 1.68 km SSE of Cliffdell, Washington · 17685 days ago · 2 km deep · 68 km away
  2. 2.23 km WSW of Artondale, Washington · 17682 days ago · 23 km deep · 69 km away
  3. 1.72 km W of Artondale, Washington · 17680 days ago · 23 km deep · 69 km away
  4. 1.75 km W of Burley, Washington · 17675 days ago · 21 km deep · 80 km away
  5. 1.92 km SSE of Belfair, Washington · 17675 days ago · 19 km deep · 87 km away
  6. 1.62 km N of Artondale, Washington · 17672 days ago · 20 km deep · 68 km away
  7. 2.39 km SSW of Gold Bar, Washington · 17671 days ago · 3 km deep · 93 km away
  8. 2.06 km WNW of Burley, Washington · 17667 days ago · 15 km deep · 82 km away
  9. 2.76 km SE of Shelton, Washington · 17667 days ago · 38 km deep · 90 km away
  10. 1.57 km W of Burley, Washington · 17667 days ago · 24 km deep · 82 km away
  11. 1.82 km E of Sammamish, Washington · 17664 days ago · 11 km deep · 78 km away

Before

  1. 1.537 km S of Morton, Washington · 17700 days ago · 11 km deep · 84 km away
  2. 1.86 km W of Burley, Washington · 17701 days ago · 22 km deep · 81 km away
  3. 1.86 km WNW of Burley, Washington · 17701 days ago · 23 km deep · 82 km away
  4. 1.510 km SSW of Index, Washington · 17703 days ago · 3 km deep · 89 km away
  5. 4.16 km W of Burley, Washington · 17707 days ago · 21 km deep · 80 km away
  6. 1.54 km W of Burley, Washington · 17726 days ago · 25 km deep · 80 km away
  7. 1.74 km W of Burley, Washington · 17726 days ago · 21 km deep · 80 km away
  8. 2.25 km W of Burley, Washington · 17726 days ago · 21 km deep · 80 km away

Earthquakes todayWashington earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10846513. Read Tue, Sep 22, 2026, 5:07 AM UTC.