Tsunami hazards from volcanoes 'underestimated'
The scale of the tsunami hazard from volcanoes that collapse into the sea has been underestimated, according to a new study.
A telephone for grief after the Japanese tsunami
Many people have come to Japan's "wind phone" after losing family in the 2011 tsunami.
'There could be other Anak Krakataus'
How many volcanoes around the world have the potential to collapse and generate tsunamis?
Touring a school hit by the 2011 Japanese tsunami
A Japanese high school hit by the 2011 tsunami has re-opened to visitors as a memorial to the disaster.