Tonga volcanic eruption triggers first mega-tsunami since antiquity.

The eruption of the underwater Tonga volcano produced a mega-tsunami nearly the height of a 30-story skyscraper, according to a recent study. The explosion may have been as strong as 15 megatons of TNT, making it about as strong as the United States' largest nuclear detonation, Castle Bravo, in 1954. The eruption released at least five blasts, generating a tsunami up to 279 feet high one minute after the largest explosion. The scientists said the strength of the 2022 eruption rivaled that of the 1883 eruption of Krakatau that killed more than 36,000 people.