Although it was stronger than any earthquake in the continental United States since the Great San Francisco earthquake of 1906 (magnitude 7.8), it was modest by Indonesian standards.
虽然除了1906年旧金山7.8级大地震外，美国本土还没有发生过比这更强烈的地震；但在印度尼西亚，这只能算是中等强度的了。
The earthquake as scientists upon my surface understand is due to the movements of the plates of continental shelves over and under one another.
地震照地表科学家的理解，是由于大陆架板块彼此挤压碰撞而形成的。
As lower Yangtze is the continental edge-extending area controlled by asthenolith through a long time of the research on geology of the depth, lower Yangtze area has general background of earthquake.
长期的深部地质研究证实，下扬子地区属软流圈软流控制下的陆缘伸展区，因而具有普遍的面积性地震背景。
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