Scientists revealed that a mega tsunami nearly 500 meters high struck Alaska, USA, last summer, ranking as the second largest giant wave ever recorded. They warned that global warming could increase the frequency of such events in the future.
A new study published in the journal Science states that a mega tsunami occurred when about 64 million cubic meters of rock—equivalent to roughly 24 Great Pyramids of Giza—collapsed into the sea in less than one minute at Tracy Arm Fjord in southeastern Alaska. The resulting mega tsunami reached nearly 500 meters high, making it the world’s second highest on record, following an event in Alaska in the 1950s that exceeded 500 meters.
Alaskan geologist Dr. Bretwood Higman described the event as a near catastrophe because it happened around midnight, meaning no tourist boats were in the area when the giant wave struck. However, he cautioned that next time, luck might not be on their side.
Researchers explained that a "mega tsunami" differs from a typical tsunami because it is caused directly by a landslide or mountain collapse into the water, rather than an undersea earthquake. Although these waves do not travel as far as regular tsunamis, they can cause immediate severe damage to nearby areas.
The research team also found that glacier melting due to global warming is a major factor destabilizing cliffs. Previously, glaciers supported the base of mountains, but as glaciers retreat, cliffs become more prone to collapse into the sea.
Scientists warn that the risk of mega tsunamis in Alaska may be tens of times higher than a few decades ago, especially as more tourists visit natural areas, with cruise ships increasingly popular for fjord and glacier tours.
However, recent reports indicate some cruise companies have begun canceling routes to Tracy Arm Fjord due to safety concerns.
. Source:BBC
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