The February 23, 1925 earthquake
M6.6near Whittier, Alaska
A magnitude 6.6 earthquake 15.5 miles deep, centred in Chugach Census Area. The 145th strongest in Alaska’s record since 1900, and the strongest within 50 miles since a magnitude 6.7 on January 31, 1912.
The earthquake
- Magnitude
- 6.6
- moment magnitude (mw)
- Depth
- 15.5 mi
- 25.0 km below the surface
- Local time
- Monday, February 23, 1925
- 13:53 AST; 23:53 UTC
- In Alaska’s record
- 145th
- strongest of 124,625 since 1900
USGS ANSS Comprehensive Earthquake Catalog, event iscgem910392 (“57 km ENE of Whittier, 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
- Chugach Census AreaAK · inside
- Copper River Census AreaAK · 21.6 mi
- Anchorage MunicipalityAK · 26.8 mi
- Matanuska-Susitna BoroughAK · 33.2 mi
- Kenai Peninsula BoroughAK · 36.3 mi
Earthquakes around the epicentre
642 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 31, 1912M6.7
- February 15, 1916M6.4
- September 21, 1911M6.3
USGS ANSS Comprehensive Earthquake Catalog. Local time is the time zone of the county nearest the epicentre. Magnitudes are as the catalogue reports them.