Volcanic hazards：练习题

Which of the following is classified as a primary volcanic hazard?

Which volcanic hazard consists of a fast-moving, glowing cloud of hot gas and volcanic ash, reaching temperatures of over \(800^{\circ}\text{C}\)?

When analyzing volcanic hazards, how does the viscosity of magma typically influence the magnitude and explosivity of a volcanic event?

Which of the following secondary volcanic hazards is most likely to cause significant environmental and economic disruption hundreds of kilometers away from the vent, long after the initial eruption?

Describe the nature of a nuée ardente and its primary environmental impact.

Analyze why stratovolcanoes associated with destructive plate margins typically produce more explosive eruptions than shield volcanoes at constructive margins.

Volcanic hazards
(a) Distinguish between primary and secondary volcanic hazards, providing examples for each.
(b) Using a recent volcanic event as evidence, evaluate the effectiveness of short-term emergency responses in reducing mortality rates.

Volcanic hazards

Using a case study of a recent volcanic eruption, evaluate the extent to which secondary hazards (such as lahars or acid rain) can pose a greater long-term economic and environmental threat than the primary hazards (such as lava flows or tephra fallout). (8)