The Median Tectonic Line(MTL)is the largest active fault system on the Japan Islands and underlies many densely populated areas.To understand the seismotectonics and to reduce seismic hazard in the MTL region,we deter...The Median Tectonic Line(MTL)is the largest active fault system on the Japan Islands and underlies many densely populated areas.To understand the seismotectonics and to reduce seismic hazard in the MTL region,we determined a detailed 3-D crustal structure under the region using a large number of arrival times of the first P-waves and Moho-reflected waves(PmP).Results of detailed resolution tests show that the addition of PmP data can significantly improve the resolution of the lower crustal structure and the entire crustal structure can be imaged better than that by using P-wave data alone.The展开更多
野外考察和室内综合分析表明,日本中央构造线的右旋位错自上新世以来一直延续至今.资料表明,晚更新世以来的平均位错速率达6 .1 m m/a .高滑动速率而近1 ka 来无强破坏性地震发生的事实意味着该断裂现今可能处在蠕滑运动为主的相对稳滑...野外考察和室内综合分析表明,日本中央构造线的右旋位错自上新世以来一直延续至今.资料表明,晚更新世以来的平均位错速率达6 .1 m m/a .高滑动速率而近1 ka 来无强破坏性地震发生的事实意味着该断裂现今可能处在蠕滑运动为主的相对稳滑状态.断裂带结构简单、走向稳定、高角度而无横向断裂切割等特点有利于断裂的蠕滑运动.展开更多
文摘The Median Tectonic Line(MTL)is the largest active fault system on the Japan Islands and underlies many densely populated areas.To understand the seismotectonics and to reduce seismic hazard in the MTL region,we determined a detailed 3-D crustal structure under the region using a large number of arrival times of the first P-waves and Moho-reflected waves(PmP).Results of detailed resolution tests show that the addition of PmP data can significantly improve the resolution of the lower crustal structure and the entire crustal structure can be imaged better than that by using P-wave data alone.The
文摘野外考察和室内综合分析表明,日本中央构造线的右旋位错自上新世以来一直延续至今.资料表明,晚更新世以来的平均位错速率达6 .1 m m/a .高滑动速率而近1 ka 来无强破坏性地震发生的事实意味着该断裂现今可能处在蠕滑运动为主的相对稳滑状态.断裂带结构简单、走向稳定、高角度而无横向断裂切割等特点有利于断裂的蠕滑运动.
