M1.7 earthquake 15 km SSW of Mossyrock, Washington
A magnitude 1.7 earthquake struck 15 km SSW of Mossyrock, Washington on Sat, Apr 5, 2003, 2:00 AM PST (10:00 UTC), 17 km (10 mi) below the surface.
A larger quake followed: M3.9 3 km NW of North Portland, Oregon. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.7 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 2003-04-05 10:00:47 UTC
- Depth
- 16.6 km (10.3 mi), shallow
- Epicenter
- 46.408° N, 122.587° W
- Region
- Washington
- 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 0.3 km horizontally, 0.5 km in depth
- Magnitude uncertainty
- ±0.03
- Depth from
- From location
- Station coverage gap
- 47°
- 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: 10 in the 60 days after this one and 4 in the 30 days before it.
After
- 1.616 km SSE of Carbonado, Washington · 8565 days ago · 5 km deep · 76 km away
- 3.93 km NW of North Portland, Oregon · 8561 days ago · 17 km deep · 87 km away · felt by 980
- 1.65 km NW of North Portland, Oregon · 8561 days ago · 17 km deep · 87 km away
- 1.55 km NW of North Portland, Oregon · 8560 days ago · 16 km deep · 86 km away
- 2.24 km NW of North Portland, Oregon · 8560 days ago · 17 km deep · 87 km away
- 1.85 km WNW of North Portland, Oregon · 8551 days ago · 17 km deep · 87 km away
- 1.55 km WNW of North Portland, Oregon · 8550 days ago · 16 km deep · 87 km away
- 1.55 km WNW of North Portland, Oregon · 8550 days ago · 17 km deep · 87 km away
- 1.722 km SSE of Mossyrock, Washington · 8548 days ago · 18 km deep · 20 km away
- 2.04 km NW of North Portland, Oregon · 8542 days ago · 16 km deep · 86 km away
Before
- 2.35 km NW of North Portland, Oregon · 8584 days ago · 17 km deep · 87 km away
- 2.65 km WNW of North Portland, Oregon · 8585 days ago · 17 km deep · 87 km away
- 2.15 km WNW of North Portland, Oregon · 8585 days ago · 17 km deep · 87 km away
- 1.516 km SE of Carbonado, Washington · 8604 days ago · 4 km deep · 81 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10578563. Read Thu, Oct 1, 2026, 11:23 AM UTC.