3 - Volcanic hazards Flashcards
what are lava flows
hot or molten magma that’s come out of a volcano
what are hazards of lava flows
everything in the path can be damaged or destroyed
what are pyroclastic flows
flows of hot gas and volcanic material that follow the topography
what are hazards of pyroclastic flows/surges
heath hazard, destruction on impact, burning, fires, machinery malfunction, increase water acidity and climatic effects
what are pyroclastic surges
a turbulent low density part of a pyroclastic flow that’s not constrained by topography
why is sulphur dioxide hazardous
causes air pollution, acid rain and climatic effects
why is carbon dioxide hazardous
lethal to people and animals at concentrated levels
why is hydrogen fluoride hazardous
can cause death and injury to livestock
why did 3000 cattle unexpectedlyshow up dead at lake Nyos, Cameroon 1986
landslide onto lake released lots of volcanic CO2
what are secondary hazards of volcanos
lahars, tsunamis, fires, air pollution, disease, social effect, climatic effects
what are lahars
typically produced when pyroclastic flows mix with water, converting the initial gas rich pyroclastic flow into a fast moving heated mudflow
