东太平洋火山活动区，主要与太平洋东面的小板块（胡安德富卡板块、科科斯、纳斯卡板块）向美洲板块的俯冲有关；
B ) East Pacific Area : most volcanism are correlated with some small plates ( Juan de Fuca , Nazca , Cocos ), east to the Pacific Plate , subducted beneath the American Plate ;
科科斯板块