Mount Semeru erupted on Wednesday with pyroclastic flows and seismic tremors. Authorities maintain a Level III Alert.

An unexpectedly large explosive eruption from one of the largest Indonesia volcanoes has ended killing over a dozen people after pyroclastic flows roared down the mountain's slopes. Located on the ...

After an eruption, DIY cushions of gas help searing torrents of gas, ash, and rock spread miles from their source within a matter of minutes. Pyroclastic flows contain a deadly combination of hot rock ...