地震是一种灾害性的自然现象,它的发生是不受国界的限制的。因此地震必须由很多国家共同记录,并相互交换资料,才能研究透彻。现在国际上有个重要的地震资料交换机构,即国际地震中心,简称ISC,它是一个非官方组织,由许多国家的学术团体或事业机构所资助而工作。任务是从全球地震台收集资料,把它重新加以分析和计算,并把结果印成月报和区域地震目录,供全球的地震学者或机构使用。 ISC之历史——19世纪末叶有个英国人名叫John Milne在日本制造了Milne式地震仪并研究地震。那时人们就感到,必须 Earthquake is a disastrous natural phenomenon, its occurrence is not subject to national boundaries. Therefore, earthquakes must be jointly recorded by many countries and exchange information with each other for thorough study. There is now an important international seismic data exchange institution, the International Seismological Center, or ISC for short, which is an unofficial organization that is funded by academic organizations or institutions in many countries. The task is to gather information from global seismostats, re-analyze and calculate it, and print the results in monthly reports and regional seismological catalogs for use by seismologists and agencies around the world. ISC History - By the end of the 19th century, an Englishman named John Milne made a Milne seismograph in Japan and studied earthquakes. At that time people feel, must