Twenty years ago, the seafloor west of Indonesia abruptly pushed upward as a deep undersea fault, where two of Earth’s tectonic plates meet, slipped. The upward shove violently shifted the ...

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

Experts warn that the region runs the risk of complacency over the tsunami threat. Hurricanes, typhoons and cyclones: What's the difference? Ships warned off underwater volcano How my child came ...