surgesPyroclastic surges are more common than pyroclastic
flows, also usually smaller. Nevertheless, they can still be as lethal as
pyroclastic flows. In 1902, in the
city St. Pierre on the island Martinique in
the Carribean, a pyroclastic surge was the cause of the death of 29.000
residence in the
city. Pyroclastic surges which travel 1-2 km away from the
eruption site form in most phreatomagmatic
/volcanoes/volcanic-hazards/pyroclastic-flow/