Canada earthquake caused Tsunami in Hawaii

Tough waves , after about 6 hours arrived on the islands of the Pacific, but with a height of 1 meter, lower than expected.

It returned to Hawaii to fear the danger of a destructive tsunami. About 100,000 people have been evacuated as a precaution from the coast for fear the arrival of the tsunami waves that were estimated height of 2 meters.

Instead, the first wave heights of about 75 cm (2.5 feet) came to Hawaii a little more than 6 hours after the earthquake of 7.7 on the Richter scale occurred at 4.04 (Italian time) in Canada in the islands of Queen Charlotte (now called Haida Gwaii.)

The waves, however, arrived in the archipelago with a height more than halved compared to early predictions branched from the Pacific tsunami warning center (Ptcw) after the violent earthquake that struck the west coast of Canada.

A tidal wave height of about 40 cm (1.30 feet) was recorded about 30-40 minutes after the quake in northern California in Crescent City, Point Arena and Arena Cove, Alaska Kodiak to 0.40 feet (15 cm) and on the coasts of Oregon Port Orford (20 cm). This was reported by the Alaska Tsunami Warning Center and the Pacific coast. The quake occurred at 20.04 (local time in Western Canada) on Saturday, The epicenter was located at a depth of 17.5 km per 140 km south of Masset in the Queen Charlotte islands not far from the border with Alaska.

There has been no significant damage on the mainland, as the islands are sparsely inhabited. In that area the Pacific plate subduce under the North-American and moves in the direction north-northwest at a speed of about 5 centimeters per year. In the last 40 years the area has been affected by seven earthquakes above 6 degrees, the strongest of 6.6 Richter in 2009. in 1949 an earthquake of 8.1 degrees occurred .

Sources : http://www.corriere.it/scienze_e_tecnologie/12_ottobre_28/terremoto_canada_allarme-tsunami-hawaii_4559ac50-20d8-11e2-89f5-89e01e31e2ac.shtml