Map shows California areas at tsunami risk ... Most of Alaska, including the Aleutian Islands, forms part of the 'Ring of Fire', a notorious belt around the Pacific Ocean known for its seismic ...

to map 16.524 sq km (4,739 sq nm) of previously uncharted seafloor around the Aleutian Islands over a 52-day stint. But the Surveyor still had work to do, and subsequently set off to map an area ...