Tsunami

This winter, a volcano in Tonga blew its top. New pressure wave analyses reveal an explosion to rival the 19th-century Krakatau eruption.

Tonga faces possible new COVID risks as it assesses damage from an eruption and tsunami waves.

Catastrophic waves are unlikely, but residents should be cautious.

Preparation is key for communities that live in high-risk coastal regions.

The motion of the ocean(ic crust).

The 6,000-year-old remains are still rather mysterious.

Waiting for tsunami warning to pass

The new system analyzes real-time ocean data to see when the killer waves formed

Making waves

The risk of megatsunamis may be slightly greater than expected—but they’re still extremely rare