Which phenomenon causes increased volcanic activity following a large earthquake along a subduction zone?

💡 Explanation

When a large earthquake occurs, crustal fracturing increases because seismic waves induce stress concentration, creating new or widening existing pathways for magma to ascend. Therefore increased magma flow results in increased volcanism, rather than viscosity reduction, sediment subduction, or mantle hydration which require different causal mechanisms.

• Which mechanism causes the formation of explosive stratovolcanoes at subduction zones?
• Which mechanism amplifies the influence of Hadley cells on regional conditions when land masses obstruct airflow?
• Which risk increases along coastal Arctic regions due to thermokarst landscape formation?
• Which geomorphic outcome arises following rapid tectonic uplift of a drainage basin with established alluvial fans?
• Which outcome increases proximal fault stress when stick-slip behavior occurs?
• Which outcome primarily results from water being dragged down by a subducting oceanic plate?