The May 29, 1984 earthquake
M5.0near Gillette, Wyoming
A magnitude 5.0 earthquake 11.2 miles deep, centred in Campbell County. The 12th strongest in Wyoming’s record since 1900, and the strongest within 50 miles in the catalogue, which runs from 1900.
The earthquake
- Magnitude
- 5.0
- body-wave magnitude (mb)
- Depth
- 11.2 mi
- 18.0 km below the surface
- Local time
- Tuesday, May 29, 1984
- 14:18 MDT; 20:18 UTC
- In Wyoming’s record
- 12th
- strongest of 1,557 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event usp00024q9 (“37 km W of Gillette, Wyoming”). 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
- Campbell CountyWY · inside
- Sheridan CountyWY · 23.0 mi
- Johnson CountyWY · 23.0 mi
- Crook CountyWY · 43.9 mi
- Weston CountyWY · 44.0 mi
Cities, largest first
- GilletteWY · 23.2 mi
Earthquakes around the epicentre
9 earthquakes of magnitude 3 or more within 50 miles of this epicentre since 1973.
No earlier earthquake of magnitude 5 or more within 50 miles in the catalogue since 1900.
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.