Magnitude 7.8 quake hits off Alaska: USGS
ALASKA — A powerful earthquake of magnitude 7.8 struck in the northern Pacific Ocean between the tip of Alaska's Aleutian Islands and Russia's Kamchatka Peninsula, the US Geological Survey said.
A USGS map showing the aftershocks after the 7.8-magnitude quake hit off Russia's Kamchatka Peninsula. Map: USGS
ALASKA — A powerful earthquake of magnitude 7.8 struck in the northern Pacific Ocean between the tip of Alaska's Aleutian Islands and Russia's Kamchatka Peninsula, the US Geological Survey said.
The quake struck at 11.34am on Tuesday (July 18) some 125 miles (200 km) from the city of Nikol'skoye on Bering island off the Kamchatka Peninsula. The epicentre was west of Attu, the westernmost and largest island in the Near Islands group of Alaska's remote Aleutian Islands.
The earthquake was very shallow, only 6 miles (10 km) below the seabed, which would have amplified its effect, but it was far from any mainland.
The US Pacific Tsunami Warning Centre said "hazardous tsunami waves were possible for coasts within 300 km of the earthquake epicenter”.
Tsunami waves, however, were unlikely to reach Kamchatka's eastern coast, some 500 km away.
The quake was initially reported as a magnitude 7.7 before being revised down to 7.4 and finally upgraded to 7.8, a major quake normally capable of causing widespread and heavy damage when striking on or near land.
The quake was followed by several aftershocks, including a couple above magnitude 5.0. REUTERS
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