Many people acted heroically in the aftermath of Hurricane Katrina. The Coast Guard, for instance, rescued some 34,000 people in New Orleans alone, and many ordinary citizens commandeered boats, offered food and shelter, and did whatever else they could to help their neighbors.
Tidal waves, or tides, are a predictable, com-mon occurrence along coastal communities, generated by forces beyond Earthâthe gravitational pull of the sun and moon. However, tsunamis are not predictable. They are often generated by earth-quakes, volcanic activity, and slope failure.idal waves, or tides, are a predictable, com-mon occurrence along coastal communities, generated by forces beyond Earthâthe gravitational pull of the sun and moon. However, tsunamis are not predictable. They are often generated by earth-quakes, volcanic activity, and slope failure.
Recently, someone asked about the effect landslides have on tsunamis. Tsunamis are, in fact, often generated by a submarine landslide, which typically occurs as a result of an earthquake. A submarine landslide, rock fall, or ice fall can trigger a tsunami by displacing large amounts of water.As a result, the water level rises generating a massive wave, or tsunami.he technical term for a tsunami caused by landslides, is megatsunami. Megatsunamis have considerably higher amplitude than typical tsunamis because the sheer amount of water displacement increases the wave size more than a submarine earthquake.