A pyroclastic flow is a deadly, fast-moving mix of superhot gases and volcanic matter. Shimabara Mayor Ryuzaburo Furukawa noted in a speech that the volcano is still unstable. “A 100-million ...

The landslide, probably a pyroclastic flow of hot ash and debris, swept through the ancient Shimabara City, killing as many as 10,000 people. As debris plunged into the sea and tremors shook the ...

SHIMABARA, Nagasaki Prefecture--Three cars ... On June 3, 1991, Fugendake blew its top, triggering a massive pyroclastic flow. Of the 43 victims, 16 members of the media and four taxi drivers ...