印尼苏门答腊岛北部出现的8.6级地震，并未像该国2004年灾难那样，导致海啸发生。 探索新闻网的一篇报道揭示了诸多原因。
The magnitude 8.6 earthquake that struck North Sumatra, Indonesia did not lead to a tsunami comparable to Indonesia's 2004 disaster for a couple of reasons, as said in a Discovery News story.
据美国地质勘探局消息，印尼西北部苏门答腊岛7日早上发生里氏7.8级地震，震源深度46公里。
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.
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