GEOLOGY

Detailed explanation-1: -Natural events, such as volcanic eruptions or earthquakes that occur away from humans and properties, are not considered natural hazards. They are considered natural hazards when they happen close to human populations and property. Hazard risk is the probability or chance that a natural hazard may take place.

Detailed explanation-2: -The greater the number of people there are in an area, the greater the risk. A hazard which occurs in a sparsely populated area would have a lower impact than a hazard in a densely populated area. The more developed a population, the more chance there is they are prepared for an eruption.

Detailed explanation-3: -Hazard risks are increasing due to population growth, urbanisation, pressure on marginal land and changes to the natural environment.

Detailed explanation-4: -Natural hazards can be classified into several broad categories: geological hazards, hydrological hazards, meteorological hazards, and biological hazards.