People are gathering in prayer and visiting mass graves in Indonesia’s Aceh province to mark 20 years since the massive ...

ABC News’ Diane Sawyer interviewed Nemcova in the months after the tragedy. Now, 20 years after one of the deadliest natural ...

Here is a look at tsunamis. Tsunamis are formed by a displacement of water – a landslide, earthquake, volcanic eruption, or slippage of the boundary between two of the earth’s tectonic plates – slabs ...

Early warning systems have been installed in coastal areas to alert residents of potential tsunamis, providing crucial time to seek safety. The rebuilding efforts were made possible by the support ...

Since 1800, California’s shores have been struck by more than 150 tsunamis, most of them minor, according to the California Geological Survey. Phones buzzed Thursday when the National Weather ...