5. Volcanic Hazards
This page develops a range of volcanic hazards including lava flows, ash falls, lahars, pyroclastic flows, volcanic rocks and toxic gases. Their relative impact is assessed through the significance of speed of onset, frequency and spatial spread. Syllabus 4.2.6 Volcanic hazards: lava flows, ash falls, lahars, pyroclastic flows, tephra, volcanic rocks, toxic gases; the significance of speed, size, frequency, and...