The authors firstly evaluate the strain accumulation rate of the Xianshuihe fault zone based on earthquake activity. We calculated the stress and seismic moment accumulation rate for each subsection of the Xianshuihe ...The authors firstly evaluate the strain accumulation rate of the Xianshuihe fault zone based on earthquake activity. We calculated the stress and seismic moment accumulation rate for each subsection of the Xianshuihe fault zone based on the distribution of geological slip rate and GPS survey results. According to the results, we get the recurrence intervals of characterized earthquakes on each subsection respectively. A three-dimensional finite element model for western Sichuan is constructed to discuss the earthquakes triggering among major earthquakes ({ntM}>6.7) that occurred along the Xianshuihe fault zone since 1893. The calculated Coulomb failure stress changes (?CFS) show that 5 of the 6 earthquakes with Ms>6.7 were triggered by positive ?CFS. The interactions between major earthquakes not only influence recurrence intervals of characterized earthquakes on each subsection, but also change recurrence behavior of major earthquakes along the whole fault zone.展开更多
On May 12,2019,the CPC Central Committee and the State Council released the National Ecological Civilization Pilot Zone(Hainan)Implementation Scheme(shortened into the Implementation Scheme in the following part).Acco...On May 12,2019,the CPC Central Committee and the State Council released the National Ecological Civilization Pilot Zone(Hainan)Implementation Scheme(shortened into the Implementation Scheme in the following part).According to the Implementation Scheme,by2020,the proportion of area within the ecological protection red line on land area of Hainan should be no less than 27.3%,and the proportion of area within the ecological protection red line in the offshore area in the total offshore area of Hainan should be no less than 35.1%.展开更多
基金the Ministry of Science and Technology of China (Grant No. 2004CB418406)the "Basic Science Research Plan" of the Institute of Earth-quake Science, China Earthquake Administration (Grant No. 2007-03)
文摘The authors firstly evaluate the strain accumulation rate of the Xianshuihe fault zone based on earthquake activity. We calculated the stress and seismic moment accumulation rate for each subsection of the Xianshuihe fault zone based on the distribution of geological slip rate and GPS survey results. According to the results, we get the recurrence intervals of characterized earthquakes on each subsection respectively. A three-dimensional finite element model for western Sichuan is constructed to discuss the earthquakes triggering among major earthquakes ({ntM}>6.7) that occurred along the Xianshuihe fault zone since 1893. The calculated Coulomb failure stress changes (?CFS) show that 5 of the 6 earthquakes with Ms>6.7 were triggered by positive ?CFS. The interactions between major earthquakes not only influence recurrence intervals of characterized earthquakes on each subsection, but also change recurrence behavior of major earthquakes along the whole fault zone.
文摘On May 12,2019,the CPC Central Committee and the State Council released the National Ecological Civilization Pilot Zone(Hainan)Implementation Scheme(shortened into the Implementation Scheme in the following part).According to the Implementation Scheme,by2020,the proportion of area within the ecological protection red line on land area of Hainan should be no less than 27.3%,and the proportion of area within the ecological protection red line in the offshore area in the total offshore area of Hainan should be no less than 35.1%.
