The July 2, 1999 earthquake
M5.8near Satsop, Washington
A magnitude 5.8 earthquake 24.9 miles deep, centred in Grays Harbor County. The 7th strongest in Washington’s record since 1900, and the strongest within 50 miles since a magnitude 6.7 on April 13, 1949.
The earthquake
- Magnitude
- 5.8
- duration magnitude (md)
- Depth
- 24.9 mi
- 40.0 km below the surface
- Local time
- Friday, July 2, 1999
- 18:43 PDT; 01:43 UTC on Jul 3, 1999
- In Washington’s record
- 7th
- strongest of 5,002 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event uw10474303 (“8 km N of Satsop, Washington”). The USGS event page carries the ShakeMap, felt reports and the official summary.
Counties and cities within 50 miles
Distance from the epicentre to each county boundary (zero when inside) and to each city centre.
Counties
- Grays Harbor CountyWA · inside
- Mason CountyWA · 1.3 mi
- Thurston CountyWA · 12.3 mi
- Pacific CountyWA · 20.0 mi
- Lewis CountyWA · 20.0 mi
- Jefferson CountyWA · 30.7 mi
- Pierce CountyWA · 32.0 mi
- Kitsap CountyWA · 37.6 mi
- King CountyWA · 47.8 mi
- Cowlitz CountyWA · 49.0 mi
- Wahkiakum CountyWA · 49.0 mi
Earthquakes around the epicentre
81 earthquakes of magnitude 3 or more within 50 miles of this epicentre since 1973.
Earlier earthquakes of magnitude 5 or more within 50 miles, strongest first
- April 13, 1949M6.7
- November 12, 1939M6.1
- February 14, 1946M5.8
- October 27, 1940M5.1
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.