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起伏波动的地幔的一种新理论能帮助地震学家预报何时何地将发生地震。现在在加利福尼亚是令人担忧的时刻。沿圣安德烈斯断层安置的地震仪器台网,不祥地显示了地壳正在隆起,并且叽叽嘎嘎地作响,就象一台有毛病的旧的辅助发动机一样。监视圣安德烈斯的地震学家和地球物理学家真有点担心。虽然这里里氏8级以上的大地震不会经常发生,但是科学家们知道大地震将会发生。圣安德烈斯断层北段自1906年旧金山
A new theory of fluctuating mantle can help seismologists predict when and where earthquakes will occur. Now in California is a worrying moment. The seismograph network along the San Andres fault shows ominously the uplift of the earth’s crust and the quaking of it, like a faulty old auxiliary engine. Seismologists and geophysicists monitoring San Andrés are really worried. Although large earthquakes above magnitude 8 here are unlikely to occur, scientists know that a major earthquake will occur. San Andreas Fault North Section since 1906 San Francisco