Seismic hazards: Practice Questions

In the context of seismic hazards, which phenomenon occurs when unconsolidated, water-saturated ground loses its mechanical strength and behaves like a fluid during intense shaking?

Which statement best explains why earthquakes are generally characterized by low predictability despite high spatial regularity along plate margins?

Which seismic process occurs when shaking causes water-saturated, unconsolidated sediments to lose their structural integrity and behave like a fluid?

Which statement best explains the spatial distribution of high-magnitude seismic events in relation to plate tectonics?

Briefly explain the geological process that leads to soil liquefaction during a seismic event.

Explain how seismic shockwaves (P and S waves) differ in their transmission through the Earth's interior and their relative contribution to surface damage during an earthquake.

Seismic hazards

The impact of a seismic event is often more closely related to human factors than the magnitude of the earthquake itself.

(a) Examine the relationship between liquefaction and the geological characteristics of a region. (3)

(b) To what extent do socio-economic levels of development determine the effectiveness of a community's mitigation and preparedness strategies in the face of a major seismic event? (6)