| 2014 Aleutian Islands earthquake | |
| Timestamp: | 2014-06-23 20:53:09 |
| Anss-Url: | usc000rki5 |
| Isc-Event: | 604760173 |
| Local-Time: | 11:53 (HDT) (UTC-9) |
| Magnitude: | 7.9 Mw[1] |
| Depth: | 107.5km (66.8miles) |
| Type: | Oblique-slip |
| Aftershocks: | 6.0 June 23 at 21:11 UTC |
| Countries Affected: | Alaska, United States |
| Tsunami: | 17cm (07inches) |
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 VIII (Severe). The shock occurred in the Aleutian Islands – part of the US state of Alaska – 19miles southeast of Little Sitkin Island.
The earthquake was initially reported as 8.0 before it was downgraded to 7.9.[2] 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,[3] but was soon downgraded to a tsunami advisory for much of the Aleutian Islands;[4] however, the hypocenter was too deep to generate a tsunami that would affect the Pacific basin.[5] A small non-destructive tsunami was generated, with heights of 17 cm on Amchitka.[6] [7]
Sources