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2014 Aleutian Islands earthquake

From Wikipedia, the free encyclopedia

2014 Aleutian Islands earthquake
2014 Aleutian Islands earthquake is located in Alaska
2014 Aleutian Islands earthquake
UTC time2014-06-23 20:53:09
ISC event604760173
Local date23 June 2014 (2014-06-23)
Local time11:53 (HDT) (UTC-9)
Magnitude7.9 Mw [1]
Depth107.5 kilometers (66.8 mi)
Epicenter51°48′N 178°46′W / 51.80°N 178.76°W / 51.80; -178.76
Areas affectedAlaska, United States
Max. intensityVI (Strong) at Adak [2]
Aftershocks6.0 Mw June 23 at 21:11 UTC [3]

The 2014 Aleutian Islands earthquake occurred on 23 June at 11:53 HDT (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.


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.


A tsunami warning was issued,[4] but was soon downgraded to a tsunami advisory for much of the Aleutian Islands;[5] however, the hypocenter was too deep to generate a tsunami that would affect the Pacific basin.[6] A small non-destructive tsunami was generated.[7]

See also


  1. ^ USGS. "M7.9 - 19km SE of Little Sitkin Island, Alaska". United States Geological Survey.
  2. ^ AEC. "M7.9 Rat Islands Earthquake of June 23, 2014". Alaska Earthquake Center.
  3. ^ USGS. "M6.0 - 6km WNW of Little Sitkin Island, Alaska". United States Geological Survey.
  4. ^ "TSUNAMI MESSAGE NUMBER 1 NWS NATIONAL TSUNAMI WARNING CENTER PALMER AK". US National Weather Service. Archived from the original on 1 July 2014. Retrieved 24 June 2014.
  5. ^ "TSUNAMI MESSAGE NUMBER 4 NWS NATIONAL TSUNAMI WARNING CENTER PALMER AK". US National Weather Service. Archived from the original on 2014-06-26. Retrieved 24 June 2014.
  6. ^ "TSUNAMI BULLETIN NUMBER 002 PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS". Pacific Tsunami Warning Center. US National Weather Service. Retrieved 24 June 2014.
  7. ^ "TSUNAMI MESSAGE NUMBER 5 NWS NATIONAL TSUNAMI WARNING CENTER PALMER AK". National Weather Service. 23 June 2014. Archived from the original on 1 July 2014. Retrieved 24 June 2014.


External links

This page was last edited on 1 October 2019, at 00:53
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