Experts have issued a warning about a potential “mega tsunami” that could sweep away entire communities with its massive waves. Alaska, Hawaii and the West Coast of the mainland US face an ongoing threat due to how close they are to disaster zones — and the West Coast just received a renewed warning. A new study published in the Proceedings of the National Academy of Sciences revealed that an earthquake could erupt along the Cascadia subduction zone, a fault that stretches from Northern Vancouver Island to Cape Mendocino, California. Researchers from Virginia Tech found that a potential powerful earthquake combined...