Origin time 20:53:09 (UTC) Type Oblique-slip Max. intensity VI (Strong) at Adak Depth 107,500 m | Magnitude 7.9 Mw Areas affected Alaska, United States Tsunami Yes Date 23 June 2014 | |
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Location Aleutian Islands, Alaska, United States Similar 1909 Wabash River eart, 2003 Alabama earthquake, 2008 Illinois earthquake, 1993 Scotts Mills earthquake, 1663 Charlevoix earthquake | ||
The 2014 Aleutian Islands earthquake occurred on 23 June at 11:53 HADT (UTC-9) with a moment magnitude of 7.9 and a maximum Mercalli intensity of VI (Strong). The shock occurred in the Aleutian Islands – part of the US state of Alaska – 19 miles (31 km) southeast of Little Sitkin Island.
Contents
Earthquake
The rupture was on a normal fault, at ~107 km depth. Based on the geometry of the slab, and the relative movement of the tectonic plates, the slip vector is likely to have been oblique down-dip towards the ESE. The fault plane appears to be oblique, striking NW-SE and cutting steeply into the subducting slab.
Tsunami
A tsunami warning was issued, but was soon downgraded to a tsunami advisory for much of the Aleutian Islands; however, the hypocenter was too deep to generate a tsunami that would affect the Pacific basin. A small non-destructive tsunami was generated.