Sent_en: 2zh Seismologists at USGS have indicated that this earthquake is an aftershock of the 9.0 earthquake which had occurred just a few hours earlier, 305 km (190 miles) distant, in the Indian Ocean near Sumatra, Indonesia.
Sent_yy: 美国地质勘探局的地震学家指出，这次地震是几小时前发生在305公里（190英里）远的印尼苏门答腊岛附近的印度洋上的9.0级地震的余震。