Strong Quake, Aleutian Islands

A strong earthquake struck the Fox Islands in the Aleutian chain early last night.

Monday 19th July 2010

A shallow magnitude 6.7 earthquake struck 60 km east-north-east of Yunaska Island, Alaska at 5:57 last night, New Zealand time. The quake, centred in the Fox Islands near the middle of the Aleutian chain of islands in the North Pacific was 10 km deep, according to the U.S. Geological Survey.

Geoscience Australia reported the quake as magnitude 6.9 at a depth of 10 km. It estimated that the quake would have caused damage within 90 km of the epicentre and would have been felt up to 1100 km away.

The Pacific Tsunami Warning Centre issued a bulletin for areas bordering the Pacific Ocean at 6:04 p.m. New Zealand time, advising that a widespread tsunami threat did not exist. The PTWC reported the quake as magnitude 6.7 at a depth of 59 km.

In a separate bulletin issued for Hawaii, the PTWC advised that the Alaska Warning Centre had issued a regional tsunami warning and it was considered that some areas of Hawaii could experience small non-destructive sea level changes and strong currents lasting several hours. However, this was retracted in another bulletin issued five minutes later as the Alaska Warning Centre had not issued a warning, and the advice of a threat to Hawaii was withdrawn.

[Compiled from data supplied by the U.S. Geological Survey and its contributing agencies, the U.S. National Oceanic & Atmospheric Administration’s Pacific Tsunami Warning Centre, and Geoscience Australia.]

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