The October 18, 1964 earthquake
M5.0near Richmond, Utah
A magnitude 5.0 earthquake 6.2 miles deep, centred in Cache County. The 23rd 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
- 5.0
- moment magnitude (mw)
- Depth
- 6.2 mi
- 10.0 km below the surface
- Local time
- Sunday, October 18, 1964
- 11:33 MST; 18:33 UTC
- In Utah’s record
- 23rd
- strongest of 2,224 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event iscgem863670 (“2 km S of Richmond, 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
- Box Elder CountyUT · 12.2 mi
- Rich CountyUT · 15.7 mi
- Franklin CountyID · 16.6 mi
- Oneida CountyID · 16.6 mi
- Bear Lake CountyID · 17.3 mi
- Bannock CountyID · 25.1 mi
- Weber CountyUT · 32.9 mi
- Caribou CountyID · 35.9 mi
- Morgan CountyUT · 42.2 mi
- Lincoln CountyWY · 45.4 mi
- Uinta CountyWY · 45.4 mi
Cities, largest first
- OgdenUT · 46.9 mi
- LoganUT · 11.0 mi
- West HavenUT · 49.2 mi
- North OgdenUT · 41.0 mi
- Brigham CityUT · 29.7 mi
- SmithfieldUT · 4.4 mi
- TremontonUT · 22.8 mi
- North LoganUT · 8.5 mi
- Pleasant ViewUT · 40.7 mi
- HyrumUT · 18.4 mi
Earthquakes around the epicentre
193 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
- October 5, 1909M5.6
- April 6, 1934M5.5
- April 14, 1934M5.2
- March 12, 1934M5.1
- March 15, 1934M5.1
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.