南北地震带及青藏块体东部垂直形变与地震活动研究
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摘要
通过对南北地震带及青藏块体东部各形变监测区近30年区域水准资料的计算分析,发现地壳运动和地震活动之间存在一定的呼应关系.地壳运动呈激烈的继承性运动,地震处于弱活动阶段;地壳运动继承性减弱(或呈逆继承性运动),地震处于强活跃阶段.地震活动强弱在时间上明显滞后于地壳运动,二者活动方式具有明显的波动性和周期性.现今地壳运动在运行到波谷后呈缓慢增强的继承性运动,估计未来几年内南北地震带地震活动仍将维持现状,不会出现明显的增强趋势.
By calculating and analysing the regional leveling measurement record in near 30 years in Chinese northsouth seismic belt and eastern Qinghai-Xizang block,the corresponding relation between crust movement and seismic activity is discovered. During crustal movement represents strong inheritance motion, seismicity is weaker;when inherited movement is abated or represents counterinheritance motion, seismicity is stronger.The transposition of strengthening and weakening of seismicity is obviously delayed to one of crustal movement,and both activities are periodic and fluctuated.Nowadays crustal movement is enhanced inheritance motion after running to valley,so seismic activity will possibly keep situation and not be enhanced in some future years in Chinese northsouth seismic belt.
By calculating and analysing the regional leveling measurement record in near 30 years in Chinese northsouth seismic belt and eastern Qinghai-Xizang block,the corresponding relation between crust movement and seismic activity is discovered. During crustal movement represents strong inheritance motion, seismicity is weaker;when inherited movement is abated or represents counterinheritance motion, seismicity is stronger.The transposition of strengthening and weakening of seismicity is obviously delayed to one of crustal movement,and both activities are periodic and fluctuated.Nowadays crustal movement is enhanced inheritance motion after running to valley,so seismic activity will possibly keep situation and not be enhanced in some future years in Chinese northsouth seismic belt.
引文
[1]江在森,王双绪,赵振才.南北地震带和青藏块体东部近期大地形变与地震特征[J].中国地震,1997,13(2):139—150.
[2] 江在森,巩守文.水准监测网的分段速率整体平差[J].武汉测绘科技大学学报,1994,19(2):157—162.
[3]张希,江在森,张四新.借助最小二乘配置整体解算地壳视应变场[J].地壳形变与地震,1998,18(2):57—62.
[4] 张希,江在森.位移观测值协方差矩阵模拟及其在整体解算地壳应变场中的应用[J].西北地震学报,1999,21(1):72—77.
[5]黄立人,王敏.中国大陆现今地壳水平运动[J].地震学报,2000,22(3):257—262.
[6]马杏垣.中国岩石圈动力学纲要[M],北京:地质出版社,1987.
[7]杨立明,王振亚,郑卫平,等.青藏高原北部地区7级以上地震孕育演化特征及其应用研究[J].西北地震学报,2000,22(2):147—153.
[8] 杨立明,许辉.青藏块体7级地震相互关系研究初步[J].西北地震学报,2002,24(3):241—246.~~
[2] 江在森,巩守文.水准监测网的分段速率整体平差[J].武汉测绘科技大学学报,1994,19(2):157—162.
[3]张希,江在森,张四新.借助最小二乘配置整体解算地壳视应变场[J].地壳形变与地震,1998,18(2):57—62.
[4] 张希,江在森.位移观测值协方差矩阵模拟及其在整体解算地壳应变场中的应用[J].西北地震学报,1999,21(1):72—77.
[5]黄立人,王敏.中国大陆现今地壳水平运动[J].地震学报,2000,22(3):257—262.
[6]马杏垣.中国岩石圈动力学纲要[M],北京:地质出版社,1987.
[7]杨立明,王振亚,郑卫平,等.青藏高原北部地区7级以上地震孕育演化特征及其应用研究[J].西北地震学报,2000,22(2):147—153.
[8] 杨立明,许辉.青藏块体7级地震相互关系研究初步[J].西北地震学报,2002,24(3):241—246.~~
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