Nature of vulcanicity and its relation to plate tectonics: forms of volcanic hazard including nuées ardentes, lava flows, mudflows, pyroclastic and ash fallout, gases/acid rain, tephra
Volcanoes produce several distinct hazards, from fast-moving clouds of superheated gas to ash and mudflows. The type of plate boundary largely controls how violent and explosive those hazards are.
Real World
During the 1997 Soufrière Hills eruption in Montserrat, pyroclastic flows and ash fallout destroyed Plymouth, the island's capital, forcing evacuation of over half the population and demonstrating how multiple hazard types can strike simultaneously.
Exam Focus
When listing volcanic hazards, always qualify each with speed, temperature or reach to demonstrate understanding beyond simple recall.
Essay Framework
Use PEEL to structure every paragraph. Tap each step for guidance and an example.
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