ISBN: | 978-5-5087-4659-9 |
High Quality Content by WIKIPEDIA articles! Megatsunami is an informal term to describe a tsunami that has initial wave heights that are much larger than normal tsunamis. Unlike usual tsunamis – which originate from tectonic activity and the raising or lowering of the sea floor – known megatsunamis have originated from a large scale landslide, collision, or volcanic eruption event.