M5.8 earthquake 8 km N of Satsop, Washington
A magnitude 5.8 earthquake struck 8 km N of Satsop, Washington on Fri, Jul 2, 1999, 6:43 PM PDT (01:43 UTC), 40 km (25 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.8 (md), moderate
- Local time
- UTC
- 1999-07-03 01:43:54 UTC
- Depth
- 40.0 km (24.9 mi), shallow
- Epicenter
- 47.074° N, 123.464° W
- Region
- Washington
- Strongest shaking
- V, moderate shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- V, moderate shaking
- Peak ground acceleration
- 8.6% of gravity
- Peak ground velocity
- 1.9 cm/s
- Map
- Automatic
Did you feel it?
No one has reported feeling this quake to the USGS.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Normal
- Nodal plane 1
- Strike 199°, dip 34°, rake -61°
- Nodal plane 2
- Strike 345°, dip 61°, rake -108°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 0.1 km horizontally, 0.1 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- Operator assigned
- Station coverage gap
- 85°
- Stations used
- 48
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10474303 (also filed as choy19990703014354, gcmtb070399a, usp0009az6, gcmt19990703014354, iscgem1654261, atlas19990703014356). Read Tue, Sep 22, 2026, 4:51 PM UTC.