SHIMABARA, Nagasaki Prefecture--Locals gathered here on June 3 to commemorate the massive eruption of Mount Unzen’s Fugendake ... noted in a speech that the volcano is still unstable.

Composite volcanoes are the most common type of volcano. They can have violent eruptions and can grow bigger as layers of thick lava and ash harden on top of each other. Mount Etna in Sicily ...

Deadliest volcanic eruption: The 1815 eruption of Mount ... volcano is Tamu Massif, and it sits on a seamount east of Japan, its summit 6,500 feet (1,980 m) below the ocean surface. One final type ...