The October 8, 2017 earthquake

M6.5near Attu Station, Alaska

A magnitude 6.5 earthquake 73.9 miles deep, 31.3 miles off Aleutians West Census Area. The 187th strongest in Alaska’s record since 1900, and the strongest within 50 miles since a magnitude 6.5 on June 13, 2006.

The earthquake

Magnitude: 6.5; moment magnitude (mww)
Depth: 73.9 mi; 119.0 km below the surface
Local time: Sunday, October 8, 2017; 13:34 HDT; 22:34 UTC
Epicentre: 52.39°N, 176.77°E; 31.3 mi from Aleutians West Census Area
In Alaska’s record: 187th; strongest of 124,625 since 1900
Within 50 miles: 1; county; more on this date

USGS ANSS Comprehensive Earthquake Catalog, event us2000b2vq (“247 km ESE of Attu Station, Alaska”). 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

Aleutians West Census AreaAK · 31.3 mi

Earthquakes around the epicentre

706 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 29, 1981M7.0
December 29, 1961M6.5
June 13, 2006M6.5
October 19, 1956M6.5
June 23, 2014M6.3
June 26, 2006M6.2
August 21, 1939M6.1
June 13, 2006M6.0
October 17, 1979M6.0
January 1, 1962M5.9

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