Hawaii tsunami: 5-foot-high wave shakes Oahu coast in U.S. | First footage shows nightmare scenes A powerful #tsunami triggered by a massive undersea #earthquake near #Russia's Kamchatka Peninsula is now impacting #Hawaii. The Pacific Tsunami Warning Center has recorded waves up to 4 feet on Oahu's northern coast, with multiple surges expected throughout the night. Honolulu's mayor is urging residents in low-lying areas to evacuate to higher ground as sirens echo across the islands. #HawaiiTsuna

A new study challenges long-held tsunami formation theory by simulating them in a wave tank. Watch the video and read more here: http://blogs.agu.org/geospace/2017/04/26/new-study-challenges-long-held-tsunami-formation-theory-plus-video/ | American Geophysical Union (AGU)