山西带近期水平运动状态
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摘要
以山西带10期GNSS复测资料(2002—2011)为基本依托,借助GAMIT/GLOBK/QOCA软件计算了山西带2002—2010年的平均水平运动速率及2011年3月11日日本9.0级特大地震之后至8月的总体偏离位移,同时利用多核函数对该震的同震位移进行了数值解析。结果表明:①2002—2010年水平运动速率普遍小于1.0mm/a,有一定的随机性,一致性和规律性较差;②日本地震的同震位移方向近于正东向,其中最大值达到6.3mm,位于山西带北端,最小值为3.4mm,位于山西带南端;③震后偏离位移在山西南部表现为以北向为主的运动,平均位移约4.0～5.0mm;中部为北东向运动,平均位移约1.0～3.0mm;北部则向北北东、北东向运动,平均位移是3.0～4.0mm。
Based on the analysis of ten years' GNSS data(2002—2011) in Shanxi area,the average motion velocity of the area from the year 2002 to 2010 and the general displacement caused by the March 11,2011 Mw 9.0 Tohoku-oki earthquake,are obtained through GAMIT/GLOBK/QOCA.The coseismic displacement is resolved using multi-kernel function.The results show that:(1) 2002—2004 horizontal motion velocity is generally less than 1.0mm/a,randomicity and poor in consistency and regularity;(2) The coseismic displacement of Tohoku-oki earthquake points generally to the east;and the maximum value reaches 6.3mm,located in Northern Shanxi;the minimum value is 3.4mm,located in Southern Shanxi;(3) After Tohoku-oki earthquake,the non-coseismic displacement points generally to north in Southern Shanxi,averaged 4～5 mm;to NE in Middle Shanxi,averaged 1～3 mm;to NNE or NE in Northern Shanxi,averaged 3～4 mm.
Based on the analysis of ten years' GNSS data(2002—2011) in Shanxi area,the average motion velocity of the area from the year 2002 to 2010 and the general displacement caused by the March 11,2011 Mw 9.0 Tohoku-oki earthquake,are obtained through GAMIT/GLOBK/QOCA.The coseismic displacement is resolved using multi-kernel function.The results show that:(1) 2002—2004 horizontal motion velocity is generally less than 1.0mm/a,randomicity and poor in consistency and regularity;(2) The coseismic displacement of Tohoku-oki earthquake points generally to the east;and the maximum value reaches 6.3mm,located in Northern Shanxi;the minimum value is 3.4mm,located in Southern Shanxi;(3) After Tohoku-oki earthquake,the non-coseismic displacement points generally to north in Southern Shanxi,averaged 4～5 mm;to NE in Middle Shanxi,averaged 1～3 mm;to NNE or NE in Northern Shanxi,averaged 3～4 mm.
引文
[1]王敏,李强,王凡,等.全球定位系统测定的2011年日本宫城MW9.0级地震远场同震位移[J].科学通报,2011,56(20):1593-1596.
[2]路鹏,杨国华,张风霜,等.昆仑山口西8.1级地震与山西断陷带水平运动变化的探讨[J].国际地震动态,2007,(7):92-98.
[3]王学忠,韩月萍,杨博,等.山西断陷带水平形变分析[J].山西地震,2009,(3):8-12.
[4]杨国华,王敏,韩月萍,等.山西地震带近期水平运动状态及活动性[J].地壳形变与地震,1999,19(4):50-55.
[5]杨国华,王敏.山西断裂带活动趋势与动态特征[J].中国地震,2002,18(2):148-156.
[6]马杏垣,等.中国岩石圈动力学图集[M].北京:中国地图出版社,1989.
[7]杨国华,江在森,武艳强,等.中国大陆整体无净旋转基准及其应用[J].大地测量与地球动力学,2005,25(4):6-10.
[8]杨博,占伟,高艳龙,等.GNSS垂向形变场信息提取的尝试[J].华北地震科学,2012,30(1):1-5.
[9]万文妮.山西带形变监测场地情况调查[J].华北地震科学,2012,30(2):17-22.
[10]彭丽娟,陆明勇,王秀文.张北6.2级地震前断层活动特征研究[J].华北地震科学,2012,30(1):54-58.
[2]路鹏,杨国华,张风霜,等.昆仑山口西8.1级地震与山西断陷带水平运动变化的探讨[J].国际地震动态,2007,(7):92-98.
[3]王学忠,韩月萍,杨博,等.山西断陷带水平形变分析[J].山西地震,2009,(3):8-12.
[4]杨国华,王敏,韩月萍,等.山西地震带近期水平运动状态及活动性[J].地壳形变与地震,1999,19(4):50-55.
[5]杨国华,王敏.山西断裂带活动趋势与动态特征[J].中国地震,2002,18(2):148-156.
[6]马杏垣,等.中国岩石圈动力学图集[M].北京:中国地图出版社,1989.
[7]杨国华,江在森,武艳强,等.中国大陆整体无净旋转基准及其应用[J].大地测量与地球动力学,2005,25(4):6-10.
[8]杨博,占伟,高艳龙,等.GNSS垂向形变场信息提取的尝试[J].华北地震科学,2012,30(1):1-5.
[9]万文妮.山西带形变监测场地情况调查[J].华北地震科学,2012,30(2):17-22.
[10]彭丽娟,陆明勇,王秀文.张北6.2级地震前断层活动特征研究[J].华北地震科学,2012,30(1):54-58.
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