Variations in Disaster Risk

What are the key components of disaster risk?

• Nature of Hazard

• Exposure

• Preparedness

• Vulnerability

Which of the following is/are correct about disaster risk?

• It is the probability of a disaster occurring.

• It depends on the interaction between hazard, exposure, and vulnerability.

• It is only affected by natural hazards.

• It only depends on the population density.

Which of the following increases disaster risk?

• High exposure

• Low vulnerability

• How damaging the hazard is

• More protective infrastructure

What factors affect the disaster risk of a volcanic eruption?

• Chemical composition of magma

• Presence of human settlements

• Availability of water nearby

• Earthquake depth

Which characteristics of high-silica magma contribute to a more explosive eruption?

• More viscous

• Harder for gas to escape

• Less pressure buildup

• More pressure buildup

Why does low-silica magma create effusive eruptions?

• It is less viscous

• It flows easily

• It traps more gas

• It results in greater pressure buildup

Which are common hazards of volcanic eruptions?

• Pyroclastic flow

• Lahar

• Tornadoes

• Ash fall

How can prevailing wind conditions affect disaster risk during a volcanic eruption?

• It determines the direction of ashfall

• Strong winds can spread ash to a larger area

• It prevents lava flow

• It makes eruptions weaker

Why does the presence of water near a volcano increase disaster risk?

• Water can mix with ash to form lahars

• Water increases magma pressure

• Water cools lava and reduces hazards

• Water reduces exposure to the hazard

Which factors increase the disaster risk of an earthquake?

• High population density

• Poor building construction

• Large earthquake magnitude

• Deep earthquake focus