Question

Which of the following is NOT listed as a secondary hazard often triggered by powerful earthquake events?

• A. Landslides
• B. Tidal waves
• C. Volcanic eruptions
• D. Tsunamis

Answer 1

Answer:

C. Volcanic eruptions

volcanic eruptions are NOT typically listed as a common secondary hazard directly triggered by powerful earthquake events in the same way that landslides, tidal waves, and tsunamis are.

• Secondary Hazards of Earthquakes: Earthquakes commonly trigger landslides (due to ground shaking destabilizing slopes), tidal waves/tsunamis (due to large-scale underwater ground displacement), and sometimes fires (from broken gas lines or electrical wires) or liquefaction.

• Earthquakes and Volcanic Eruptions: While large earthquakes can sometimes influence or slightly increase the likelihood of a volcanic eruption if a volcano is already poised to erupt (meaning it has accumulated enough magma and pressure), it's not a direct, immediate, and common trigger or "secondary hazard" in the same way that tsunamis or landslides are. They share a common origin in plate tectonics, but one doesn't directly cause the other as a cascading effect. Volcanic eruptions have their own distinct triggers, primarily related to magma movement and pressure changes within the volcanic system itself.