It is 20 years since the Indian Ocean tsunami killed more than 230,000 people on Boxing Day.

Iwate and Fukushima Prefectures were ravaged by the 2011 tsunami that precipitated a catastrophic nuclear disaster. Now, this tragic, beguiling region is welcoming travellers back.

Tsunami warnings were issued after 7.6-magnitude tremors in Japan's central region on Monday.

Dozens of buildings collapse in several towns, trapping an unknown number of people.

Last year's volcanic eruption in the Pacific caused the fastest underwater flows ever recorded.

A tsunami struck the Japanese plant in 2011, leading to the worst nuclear disaster since Chernobyl.

Prodigious volumes of rocky debris blanketed the ocean bottom in January's cataclysmic blast.

Uncrewed surface vessel Maxlimer surveys the underwater Hunga-Tonga seamount that erupted in January.