2014 Aleutian Islands earthquake

2014 Aleutian Islands earthquake

Anchorage Adak
Date	23 June 2014 (2014-06-23)
Origin time	20:53:09 (UTC)
Magnitude	7.9 Mw
Depth	107.5 kilometers (66.8 mi)
Epicenter
Type	Oblique-slip
Areas affected	Alaska, United States
Max. intensity	VI (Strong) at Adak
Tsunami	Yes
Aftershocks	6.0 Mw June 23 at 21:11 UTC

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.

Earthquake

See also: Alaska-Aleutian megathrust

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.

See also

• List of earthquakes in 2014
• List of earthquakes in Alaska
• List of earthquakes in the United States

References

Sources