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从1968年起,苏联和日本两国科学家合作研究太平洋地区地壳和上地幔构造。第一阶段(1968～1970年),是以熟悉两国深部地震探测方法的特点为基础,研究两国区域内地质构造地壳和上地幔的深部结构;研究了千岛群岛-堪察加半岛和日本岛弧的震源带;绘制了日本海和鄂霍次克海海域地球物理图;研究了火山带的深部构造,这样有可能进行地震和火山的区划工作,接近预报地震和火山喷发的目的。第二阶段(1971～1978年),苏、日合作项目包括地球物理学和研究火山深部构造,火山岩石学、岩浆的特性,深部流体的演化和热液作用的火山学工作。第三阶段(1978～),绘制通过亚洲大陆向太
Since 1968, scientists from the Soviet Union and Japan have collaborated on the study of the crust and upper mantle structure in the Pacific Ocean. The first phase (from 1968 to 1970) was based on the familiarity with the deep seismic exploration methods of the two countries. Based on the characteristics of deep geological exploration methods in the two countries, the deep structure of the geological tectonic crust and the upper mantle in the two countries was studied. The Thousand Islands - Kamchatka Peninsula and Japan Island arc; the geophysical map of the Sea of Japan and the Sea of Okhotsk was drawn; and the deep structure of the volcanic belt was studied, thus making it possible to carry out the zoning of seismic and volcanic rocks close to the purpose of predicting earthquakes and volcanic eruptions. In the second phase (1971-1978), the Soviet Union and Japan collaborated on the geophysics and volcanology work on deep volcanism, volcanic petrology, magmatic characteristics, evolution of deep fluids and hydrothermal activities. The third stage (1978 ~), drawn through the Asian continent too