At the same time that the Philippine plate was ramming into the Eurasian plate, its westward movement also brought it into collision with the South China Sea plate further south.
當菲律賓海板塊逐步向西北移動，除擠壓歐亞板塊，在南方還推擠了南中國海板塊而向下衝入地球核心，地底的高溫高壓造成板塊溶融，岩漿就此噴發，一連串的火山如浴火鳳凰奪板塊而出。