The March 17, 1966 earthquake
M5.2near North Logan, Utah
A magnitude 5.2 earthquake 6.2 miles deep, centred in Cache County. The 14th strongest in Utah’s record since 1900, and the strongest within 50 miles since a magnitude 5.8 on August 30, 1962.
The earthquake
- Magnitude
- 5.2
- moment magnitude (mw)
- Depth
- 6.2 mi
- 10.0 km below the surface
- Local time
- Thursday, March 17, 1966
- 04:47 MST; 11:47 UTC
- In Utah’s record
- 14th
- strongest of 2,224 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event iscgem849333 (“16 km ENE of North Logan, Utah”). 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
- Cache CountyUT · inside
- Rich CountyUT · 6.4 mi
- Bear Lake CountyID · 14.5 mi
- Franklin CountyID · 14.5 mi
- Box Elder CountyUT · 20.2 mi
- Weber CountyUT · 26.1 mi
- Oneida CountyID · 28.6 mi
- Morgan CountyUT · 32.0 mi
- Lincoln CountyWY · 33.3 mi
- Uinta CountyWY · 33.3 mi
- Bannock CountyID · 34.3 mi
- Caribou CountyID · 42.1 mi
- Davis CountyUT · 47.7 mi
- Summit CountyUT · 47.9 mi
Cities, largest first
- OgdenUT · 43.9 mi
- LoganUT · 12.5 mi
- RoyUT · 49.2 mi
- West HavenUT · 47.1 mi
- North OgdenUT · 38.3 mi
- Brigham CityUT · 30.6 mi
- South OgdenUT · 47.2 mi
- SmithfieldUT · 11.1 mi
- TremontonUT · 30.1 mi
- North LoganUT · 10.0 mi
- Pleasant ViewUT · 38.7 mi
- HyrumUT · 16.8 mi
Earthquakes around the epicentre
133 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
- August 30, 1962M5.8
- April 6, 1934M5.5
- October 18, 1964M5.0
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.