The southwest coast of Sumatra, Indonesia, was rocked by an 8.4 magnitude earthquake on Wednesday night, and a 7.8-magni印尼苏门答腊岛西南岸周三晚上发生规模8.4的地震，周四早上再度发生规模7.8的地震，地震震央接近明古鲁市及巴东市外海附近，也发布海啸警报。