Information on volcano in Montserrat and recent eruption there
James McCaffrey
Dear James,
The Monserrat Volcano Observatory reported that the eruption at the
Soufriere Hills volcano changed significantly on April 3, 1996. Since
early that morning, earthquake activity and ash emission have been nearly
continuous. A new fissure formed on the eastern flank of the volcanic
dome. Explosive eruptions created numerous pyroclastic flows and
generated ash clouds up to 30,000-40,000 feet (9,000-12,000 m) in
height. The south part of the island has been evacuated. The volcanic
dome continues to grow. A spine grew at least 215
feet (65 m) above the dome and later broke in half. A new spine grew
adjacent to the older spine but also collapsed by April 12. A large
event on April 12 generated a pyroclastic flow and an ash cloud that rose
3,000 feet (900 m) above the volcano. Rockfalls and small explosions
continued to generate up to moderate-sized ash clouds. A remnant of the
spine is still present. As of the morning of April 15, 1996, seismicity,
rockfalls, and small explosions continue.
Steve Mattox, University of North Dakota
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