The April 21, 2001 earthquake
M5.3near Freedom, Idaho
A magnitude 5.3 earthquake 0.5 miles deep, centred in Caribou County. The 12th strongest in Idaho’s record since 1900, and the strongest within 50 miles since a magnitude 5.8 on February 3, 1994.
The earthquake
- Magnitude
- 5.3
- moment magnitude (mwc)
- Depth
- 0.5 mi
- 0.8 km below the surface
- Local time
- Saturday, April 21, 2001
- 11:18 MDT; 17:18 UTC
- In Idaho’s record
- 12th
- strongest of 3,958 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event usp000adrg (“29 km WSW of Freedom, Idaho”). 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
- Caribou CountyID · inside
- Bonneville CountyID · 11.8 mi
- Bingham CountyID · 11.8 mi
- Bear Lake CountyID · 22.6 mi
- Teton CountyWY · 32.3 mi
- Lincoln CountyWY · 32.3 mi
- Bannock CountyID · 32.4 mi
- Franklin CountyID · 36.7 mi
- Sublette CountyWY · 40.4 mi
- Teton CountyID · 43.5 mi
- Madison CountyID · 48.2 mi
- Jefferson CountyID · 49.9 mi
Earthquakes around the epicentre
636 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
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.