论文部分内容阅读
最近二十年来,板块构造理论的发展,使地球科学家对主震源有了一个广泛的认识——哪里的地壳的巨大板块在相互摩擦,在大洋中脊的地方又构成了新的地壳,哪里的地震就最频繁。然而,要想完全了解并最终能对地震作出预报则要依赖于获得比目前更加详细的地壳图象。国家研究委员会的一个小组委员会认为,美国目前的地震观测台站系统不适应这一任务。在美国,地质调查局国家地震情报服务处的地震台站继续向科罗拉多州戈尔登总部输送地球运动的情报,联邦资助的台站加入了世界地震观测台组成的台网。美国的20个独立的区域性实验室管理着监视站的卫星台网,其中有
In the last two decades, the development of plate tectonics has given Earth scientists a broad understanding of mainshock sources - where huge crustal plates rub against each other and where the mid-ocean ridge forms a new crust, where Earthquakes are the most frequent. However, full understanding and eventual prediction of earthquakes will depend on obtaining more detailed crustal images than are currently available. A subcommittee of the National Research Council believes that the current system of seismic observation stations in the United States is not suitable for this task. In the United States, seismological stations at the National Seismological Information Service of the Bureau of Geological Survey continued to send intelligence on Earth’s movements to the headquarters in Golden, Colorado, and federally funded stations joined the network of World Seismic Observatories. The 20 independent regional laboratories in the United States run the satellite network of surveillance stations, among them