Pyroclastic flows and surges are potentially highly destructive owing to their mass, high temperature, high velocity and great mobility. True true False false Single Lahars are rapidly flowing thick mixture of volcanic sediments (from the pyroclastic materials) and water, usually triggered by intense rainfall during typhoons, monsoons and thunderstorms. Lahars can occur immediately after an eruption or can become long-term problem for as long as there are excess sediments on the volcano’s slope and water to remobilize these. True true False false Single Lava flows are considered the most dangerous type of hazard from a volcano and is always a big threat to human lives. True false False true Single During eruption, excessive ashfall is dangerous as it can cause poor or low visibility. True true False false Single In order to assess and forecast a volcano’s activity, volcanologists need only to use one parameter. True false False true Single Aside from instrumental monitoring, people living near volcanoes on their own, may observe premonitory events before an eruption such as intensified steaming activity. True true False false Single As the volcano unrest progresses into an eruption, volcanic earthquakes not only increase in number but the number of earthquakes felt by many people become more and more frequent. True true False false Single Be aware of community efforts such as identified evacuation areas as well as designated pick up points. True true False false Single At the peak or height of eruption, one can go out and do sightseeing as eruptions are a sight to see. True false False true Single Heavy ashfall can severely reduce visibility, that is why people are advised not to drive. True true False false Single