History Photographed on Instagram: "Video footage from the 2011 Great East Japan Earthquake and Tsunami shows a Japanese Coast Guard ship successfully riding over the swell of a massive tsunami wave. ⁠ ⁠ The incident highlighted the difference between how a tsunami behaves in the deep ocean versus when it hits the coast, and demonstrated the crew's bravery in a perilous situation.⁠ ⁠ Credit: @apnews"

Heard about a potential "mega tsunami" threatening the US Pacific Coast? The alarming term has been circulating after scientists published new findings on how much more land will be vulnerable to flooding after the next great quake occurs along a nearby seismic fault. But how real are these warnings? We asked a geologist to break it down. #usa #usnews #cascadiasubductionzone (Video: CNA/Try Sutrisno Foo, Samuel Woo) | CNA