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The amount of volcanic material, consisting of both pyroclastic material and lava flows, is great.
Pyroclastic fragmental volcanic material that has been blown into the atmosphere by an explosive eruption.
About 60 million cubic meters of dome and crater wall traveled to the south as a debris avalanche and pyroclastic density currents.
On 25 June 1997, pyroclastic flows from an eruption resulted in the first deaths directly caused by the volcano.
Tuff A type of pyroclastic rock which is derived from the collapse of volcanic ash clouds.