1. Pyroclastic flows and surges are potentially highly destructive owing to their mass, high temperature, high velocity, and great mobility.

2. 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.

3. Lava flows are considered the most dangerous type of hazard from a volcano and is always a big threat to human lives.

4. During eruption, excessive ashfall is dangerous as it can cause poor or low visibility.

5. Ash from volcanoes are also abrasive, because of this, ash suspended in air is also dangerous for airplanes as this can cause the engines to fail if the suspended ash is encountered by the airplane.