Washington earthquakes

M1.5 earthquake Washington

A magnitude 1.5 earthquake struck in Washington on Sat, Sep 20, 2003, 3:44 AM PDT (10:44 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M2.3 3 km S of Fall City, Washington. This one was a foreshock.

Eatonville 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
1.5 (Md, duration), micro
Magnitude from
Pacific Northwest Seismic Network
Local time
UTC
2003-09-20 10:44:10 UTC
Depth
17.6 km (10.9 mi), shallow
Epicenter
46.736° N, 122.361° 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 0.5 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
86°
Stations used
31

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 1.91 km WSW of Maple Valley, Washington · 8400 days ago · 8 km deep · 76 km away
  2. 1.61 km WNW of Maple Valley, Washington · 8399 days ago · 6 km deep · 77 km away
  3. 2.024 km E of Castle Rock, Washington · 8399 days ago · 18 km deep · 59 km away
  4. 1.61 km NNW of Gig Harbor, Washington · 8398 days ago · 29 km deep · 70 km away
  5. 1.710 km SSE of Mineral, Washington · 8394 days ago · 16 km deep · 21 km away
  6. 1.81 km NW of Maple Valley, Washington · 8394 days ago · 11 km deep · 77 km away
  7. 1.50 km ENE of Maple Valley, Washington · 8394 days ago · 9 km deep · 78 km away
  8. 1.510 km ESE of Riverbend, Washington · 8386 days ago · 12 km deep · 94 km away
  9. 1.65 km WSW of Belfair, Washington · 8385 days ago · 21 km deep · 88 km away
  10. 1.543 km WNW of Trout Lake, Washington · 8382 days ago · 7 km deep · 67 km away
  11. 1.715 km SSW of Morton, Washington · 8380 days ago · 18 km deep · 34 km away
  12. 2.33 km S of Fall City, Washington · 8377 days ago · 18 km deep · 96 km away
  13. 1.60 km SW of Navy Yard City, Washington · 8371 days ago · 17 km deep · 94 km away
  14. 2.04 km SW of Fall City, Washington · 8359 days ago · 21 km deep · 95 km away
  15. 1.622 km S of Packwood, Washington · 8358 days ago · 1 km deep · 68 km away
  16. 1.537 km NNE of Amboy, Washington · 8357 days ago · 0 km deep · 61 km away

Before

  1. 1.916 km WSW of Skokomish, Washington · 8415 days ago · 19 km deep · 97 km away
  2. 1.538 km NNE of Amboy, Washington · 8422 days ago · 0 km deep · 61 km away
  3. 1.615 km S of Morton, Washington · 8433 days ago · 7 km deep · 36 km away
  4. 1.61 km NE of Skokomish, Washington · 8433 days ago · 43 km deep · 90 km away
  5. 1.512 km WSW of Greenwater, Washington · 8439 days ago · 5 km deep · 61 km away

Earthquakes todayWashington earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event uw10598233. Read Thu, Oct 1, 2026, 11:21 AM UTC.