The initial data suggests Friday's earthquake moved Japan's main island about 8 feet, according to Kenneth Hudnut of the U.S. Geological Survey.
据美国地质调查局的肯尼斯哈得纳特称，最初的数据显示，上周五的大地震使日本主岛发生了约8英尺的位移。
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To gather the data, the team launched an Autonomous Underwater Vehicle (AUV) on six survey missions beneath the floating tongue of Pine Island Glacier.
为了收集数据，研究小组使用水下机器人(AUV)在松岛冰川浮动尖岬下面进行了6次调查作业。
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A major earthquake of 7.8 magnitude Wednesday morning struck at a depth of 46km off the northwestern coast of the Indonesian island of Sumatra, the US Geological Survey said.