Anatomy of a Tsunami After 7.9 Quake Off Alaska Coast - NBC Southern California

    Anatomy of a Tsunami After 7.9 Quake Off Alaska Coast

    What is a tsunami and how do they form? Shanna Mendiola explains why the 7.9-magnitude quake did not produce a large tsunami on Today in LA Tuesday, Jan. 23, 2018. (Published Tuesday, Jan 23, 2018) What is a tsunami and how do they form? Shanna Mendiola explains why the 7.9-magnitude quake did not produce a large tsunami on Today in LA Tuesday... See More