Tsunamis: Geohazards.

By: Luke Diasio


A tsunami is a series of ocean waves caused by an underwater earthquake, landslide, or volcanic eruption.


A geohazard is a geological state that may lead to widespread damage or risk. Geohazards are geological and environmental conditions and involve long-term or short-term geological processes.

Why Tsunamis are geohazards

Tsunamis are huge forces, they erode loads of soil, and displace many objects. They can take an ordinary town, and through tons of pressure and power, shift it into a ruin of a landscape. They are extremely dangerous, and can kill/seriously hurt people. And they are naturally forming, so they are geohazards. Cities/states on the beach-side are particularly vulnerable.

Worlds worst tsunami

On July 9, 1958, the worlds worst recorded tsunami, at 1720 ft tall, struck Lituya Bay, Alaska. It was about 1/3 of a mile above sea level. Millions of trees were uprooted, and pushed away. It was measured by the highest peak of the waves height, like most tsunamis. It occurred there-->

Because the cove was mostly abandoned, only one boat was sunk, and killed two fishermen.

Super deadly tsunami

A tsunami in December 22nd, 2004, a 9.1 and 9.3 tsunami hit Indonesia, and killed 230,000, mostly due to the following tsunami, and the horrible lack of aid afterwards


In the order of a tsunami, evacuate to high ground as fast as possible. If you feel an earthquake, and are near the beach, leave the area immediately. Tsunamis are not just a single wave, generally there are multiple following. Leave the area until given the OK sign by the officials. Also, make sure to have a family evacuation plan, to make your safety as smooth as possible. As a rule of thumb, IF YOU SEE THE TSUNAMI, YOU ARE TOO CLOSE TO ESCAPE. ACCEPT YOUR FATE. Tsunamis can move much faster than a human can run! ;)