Dino-killing asteroid caused global tsunami.

Oceanographers at the University of Michigan said on October 4, 2022, that the asteroid that struck Earth and wiped out the dinosaurs – 66 million years ago – also triggered a vast, global tsunami.

Their study is based on a combination of computer modeling and geological evidence. It published on October 4 in an open-access journal of the American Geophysical Union, called AGU Advances.

The great wave started out as more than a mile (1.6 km) high, they said. It was large enough to scour the ocean floor thousands of miles from the Chicxulub impact site on Mexico’s Yucat√°n Peninsula. And it took some days – “less than a week,” the scientists said – to dissipate. The authors calculated the initial energy contained in this ancient tsunami. And they found it was up to 30,000 times larger than the energy in the devastating December 2004 Indian Ocean earthquake tsunami, one of the largest tsunamis in the modern record. 

To cross-check their computer models with geologic evidence, the authors examined 120 geological sites and found evidence of a global tsunami, arriving as far away as what is now New Zealand. 

Source: AGU Advances


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