Which risk increases substantially for older unreinforced masonry buildings during an earthquake?

💡 Explanation

When seismic waves propagate, older unreinforced masonry (URM) buildings can experience shear failure because the walls lack sufficient tensile strength and connection at floor levels, leading to 'pancaking'. Therefore, pancaking is a significant risk, rather than combustion, tsunami resonance, or liquefaction which occur through different earthquake induced mechanisms.

• Which ecological outcome results from increased upwelling along coastlines?
• Which outcome occurs when the Coriolis effect interacts with subtropical high-pressure systems?
• Which risk increases when concentrated livestock farming accelerates soil acidification above subsurface limestone?
• Which consequence results when rapid pyroclastic flow deposition?
• Which increased hazard occurs when rapid snowmelt saturates an alluvial fan?
• Which ecosystem change results when pyroclastic flows deposit large amounts of ash?