Which outcome occurs when pore pressure rises rapidly during seismic shaking?

💡 Explanation

A rise in pore pressure during seismic shaking causes decreased effective stress. This promotes slope instability via the mechanism of liquefaction, because the soil loses strength; therefore debris flows become more likely, rather than a decrease in aftershocks.

• Which geophysical outcome primarily disrupts global anchovy populations from South American upwelling regions during an El Niño event?
• Which mechanism causes tsunami generation when a submarine earthquake occurs involving vertical seafloor displacement?
• Which thermal consequence arises where oceanic crust subducts beneath continental crust?
• Which phenomenon exacerbates tsunami generation immediately following a megathrust earthquake within coastal subduction zones?
• Which mechanism accelerates coastal erosion when surface water is drawn offshore by strong winds?
• Which outcome results downstream when extensive levee construction constricts a river?