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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
Anchorage
Anchorage
Adak
Adak
2014 Aleutian Islands earthquake
UTC time2014-06-23 20:53:09
ISC event604760173
USGS-ANSSComCat
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
TypeOblique-slip
Areas affectedAlaska, United States
Max. intensityVI (Strong) at Adak [2]
TsunamiYes
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.

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,[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

References

  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". tsunami.gov. 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". tsunami.gov. 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". tsunami.gov. National Weather Service. 23 June 2014. Archived from the original on 1 July 2014. Retrieved 24 June 2014.

Sources

External links

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