1研究背景地震和火山活动是地球内部圈层相互作用与能量交换的显著表现,是影响地球宜居性的重要因素,世界各国都十分注重地震与火山发生物理过程和机理的研究。人们普遍认为,构造强震可能引发火山活动。如2016年4月16日,日本发生熊本7....1研究背景地震和火山活动是地球内部圈层相互作用与能量交换的显著表现,是影响地球宜居性的重要因素,世界各国都十分注重地震与火山发生物理过程和机理的研究。人们普遍认为,构造强震可能引发火山活动。如2016年4月16日,日本发生熊本7.3级地震,约半年后的10月8日,日本阿苏山火山时隔36年再次喷发(Ozawa et al,2016)。展开更多
Based on the research and the division of the active tectonic blocks and their boundaries on the Chinese mainland, the feature of the large earthquake activities on the 24 boundaries between the 6 active tectonic bloc...Based on the research and the division of the active tectonic blocks and their boundaries on the Chinese mainland, the feature of the large earthquake activities on the 24 boundaries between the 6 active tectonic block regions (grade Ⅰ) and the 22 active tectonic blocks (grade Ⅱ) are studied. The seismicity levels on the active tectonic block boundaries are discussed considering the large earthquake frequency and the released strain energy in unit distance and time. The theoretic maximal magnitude and the recurrence period of each boundary are then calculated from the G-R relation. By comparing this with the actual earthquake records, it is found that the intensities of the earthquake deduced from the seismic activity parameter (a/b) on the main active boundaries on the Chinese mainland are consistent with that of the natural earthquakes. Meanwhile, an inverse relation is found between the recurrence periods of large earthquakes and the tectonic motion rate on the boundaries. These results show that the a, b values of each boundary obtained in this paper are valuable. In addition, the present seismic activities and hazards of these boundaries are also probed into with the historical data and their elapsed time on each boundary based on the hypothesis that the large earthquakes satisfy Poisson distribution.展开更多
文摘1研究背景地震和火山活动是地球内部圈层相互作用与能量交换的显著表现,是影响地球宜居性的重要因素,世界各国都十分注重地震与火山发生物理过程和机理的研究。人们普遍认为,构造强震可能引发火山活动。如2016年4月16日,日本发生熊本7.3级地震,约半年后的10月8日,日本阿苏山火山时隔36年再次喷发(Ozawa et al,2016)。
基金The work was supported bythe public welfare programofthe Ministry of Science and Technology of China (2004DIA3J010)the special preparatoryresearch of national keyfun-damental research project (2002CCD01700)the Young Scientists Funds of Institute of Earthquake Science , CEA(QN200401) .
文摘Based on the research and the division of the active tectonic blocks and their boundaries on the Chinese mainland, the feature of the large earthquake activities on the 24 boundaries between the 6 active tectonic block regions (grade Ⅰ) and the 22 active tectonic blocks (grade Ⅱ) are studied. The seismicity levels on the active tectonic block boundaries are discussed considering the large earthquake frequency and the released strain energy in unit distance and time. The theoretic maximal magnitude and the recurrence period of each boundary are then calculated from the G-R relation. By comparing this with the actual earthquake records, it is found that the intensities of the earthquake deduced from the seismic activity parameter (a/b) on the main active boundaries on the Chinese mainland are consistent with that of the natural earthquakes. Meanwhile, an inverse relation is found between the recurrence periods of large earthquakes and the tectonic motion rate on the boundaries. These results show that the a, b values of each boundary obtained in this paper are valuable. In addition, the present seismic activities and hazards of these boundaries are also probed into with the historical data and their elapsed time on each boundary based on the hypothesis that the large earthquakes satisfy Poisson distribution.
