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地震图和磁照图是地震事件部分地球物理场的真实反映。它是地震、地磁学研究的基础。我国是一个多地震的国家,先辈给我们留下了宝贵的文字记载和仪器记录,为开展地震予报,地震研究和国际资料交换创造了条件。 1874年,我国已经安装了地震、地磁记录仪,1957年已有相当规模(具备参加国际地球物理年的地震台12个、地磁台4个到1980年投入工作的地震台415个,地磁台201个),
Seismograms and magnetographs are the true reflection of some geophysical fields in a seismic event. It is the foundation of earthquake and geomagnetic study. Our country is a country with many earthquakes. Our predecessors left valuable records and records of instruments for our country and created the conditions for the earthquake reporting, earthquake research and international exchange of information. In 1874, China had already installed earthquakes and geomagnetic recorders. In 1957, there were already quite a large number of earthquakes (including 12 seismological stations participating in the International Geophysical Year, 4 geomagnetic stations and 415 seismological stations put into operation in 1980, and Geomagnetic Station 201 One),