The August 18, 1912 earthquake

M6.2Near Flagstaff, Arizona

A magnitude 6.2 earthquake, centred in Coconino County. The 7th strongest in Arizona’s record since 1900, and the strongest within 50 miles since a magnitude 6.2 on January 25, 1906.

The earthquake

Magnitude: 6.2; surface-wave magnitude (ms)
Depth: —; Not recorded
Local time: Sunday, August 18, 1912; 14:09 MST; 21:09 UTC
Epicentre: 35.25°N, 111.72°W; In Coconino County
In Arizona’s record: 7th; strongest of 6,972 since 1900
Within 50 miles: 2; counties; more on this date

USGS ANSS Comprehensive Earthquake Catalog, event flag19120818210933000 (“Near Flagstaff, Arizona”). 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

Coconino CountyAZ · inside
Yavapai CountyAZ · 18.9 mi

Cities, largest first

FlagstaffAZ · 7.2 mi
CottonwoodAZ · 37.6 mi
Camp VerdeAZ · 47.7 mi

Earthquakes around the epicentre

28 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

January 25, 1906M6.2
September 23, 1910M6.0

USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.