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Impacts of volcanic activity (Pyroclastic flows (Nuees Ardentes) (Primary…
Impacts of volcanic activity
Lava flows
Primary hazard
Flows of magma
Pyroclastic flows (Nuees Ardentes)
Primary hazard
Dense fluid clouds of ash, volcanic debris and hot gas (800C)
Travel large distances up to 50 miles
Speeds of 700kph destroying everything in its path
Lahars
Secondary hazard
Happen when volcanic ash combines with water
Travel up to 50mph
Volcanic landslides
Secondary hazard
Mass movement can occur on the side of the volcano
Sends debris plummeting
Volcanic gases
Primary hazard
Gases made up of carbon dioxide, carbon monoxide, sulpher dioxide, hydrogen sulphide and chloride
Flooding
Secondary hazard
Flooding caused by the melting of glaciers
Tsnuamis
Secondary hazard
Debris from a volcanic landslide can trigger a tsunami
Tephra / ashfall
Primary hazard
Solid material ejected from the volcano
Acid rain
Secondary hazard
Volcanic gases can contribute to acid rate