拉萨地震台PET重力仪同震响应特征
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摘要
从面波延迟时间、初动方向、波幅、同震持续时间等4个方面研究拉萨台PET重力仪的同震响应特征,结果表明:(1)同震响应的面波延迟时间与地震震中距离具有较好正相关性;(2)初动方向没有规律;(3)同震响应的波幅不仅与地震震级大小有关,还与震中距远近有关;(4)远震的同震波一般表现为脉冲形式,近震除了脉冲外,还有阶跃;(5)同震波的延续时间与震级没有明确的比例关系。这有助于对重力仪器进行深入的了解,可以为未来西藏地区监测台网布设方案提供参考数据。
In this paper,the coseismic response of PET gravimeter at Lhasa seismic station is studied from 4aspects of surface wave delay time,first motion direction,wave amplitude,lasting time of coseismic response.The results indicate that:(1)there is a significant positive correlation between the surface wave delay time of the coseismic response and epicentral distance;(2)first motion direction has no distribution law;(3)the amplitude of coseismic response is not only related to magnitude of earthquake but also to the epicentral distance of the earthquake.(4)the coseismic wave of distant earthquake are mostly pulse form while the coseismic wave of local earthquake also show step besides pulse;(5)there is no significant proportion relation between the lasting time of the coseismic response and magnitude.
In this paper,the coseismic response of PET gravimeter at Lhasa seismic station is studied from 4aspects of surface wave delay time,first motion direction,wave amplitude,lasting time of coseismic response.The results indicate that:(1)there is a significant positive correlation between the surface wave delay time of the coseismic response and epicentral distance;(2)first motion direction has no distribution law;(3)the amplitude of coseismic response is not only related to magnitude of earthquake but also to the epicentral distance of the earthquake.(4)the coseismic wave of distant earthquake are mostly pulse form while the coseismic wave of local earthquake also show step besides pulse;(5)there is no significant proportion relation between the lasting time of the coseismic response and magnitude.
引文
[1]牛安福,吉平,高福旺.印尼强地震引起的同震形变波[J].地震,2006,26(1),2006:131-137.
[2]牛安福,张晶,吉平.强地震引起的同震形变响应[J].内陆地震,2005,19(1):1-7.
[3]付虹,邬成栋,刘强,等.印尼巨大远震引起的云南水位异常记录及其意义[J].地震地质,2007,29(4):873-882.
[4]陈大庆,万永芳,赵明利.北京良乡、赵各庄井水位、水温同震响应对比研究[J].华南地震,2007,27(2):69-75.
[5]措加旺姆,诺桑,白玛,等.拉萨周围地震及小型地震网的建立[J].西藏大学学报,2005,20(3):69-71,80.
[6]杨玉春,李清林.西藏高原地区重力测量与研究[J].华北地震科学,1991,9(4):1-11.
[7]荆燕,张世中,李宏,等.断层垂直形变对强远震的响应[J].地震学报,2007,29(2):165-172.
[8]杨婕,刘水莲,卓群,等.台湾花莲海域强震的同震响应特征[J].华北地震科学,2011,29(3):39-43.
[9]杨婕,占惠,卓群,等.厦门地震台重力仪同震响应特征分析[J].大地测量与地球动力学,2010,30(增):96-99.
[10]邱永平.宁波地震台动水位与垂直摆对汶川8.0级地震的同震变化[J].华北地震科学,2009,27(1):30-33.
[11]段莉莉,胡滨生,李国庆.哈尔滨市延寿地震台竖直摆倾斜仪资料分析[J].华北地震科学,2006,24(4):45-48.
[12]顾申宜,刘阳,张慧,等.海南琼海加积井水位对远大震的同震响应特征研究[J].中国地震,2011,27(1):83-91.
[13]邱桂兰,官致君,杨贤和,等.四川地区地下水位对汶川地震的同震效应[J].华北地震科学,2011,29(2):40-44.
[14]孙毅,程万正.特大远震引起的形变观测变化图像[J].内陆地震.2005,19(3):264-270.
[2]牛安福,张晶,吉平.强地震引起的同震形变响应[J].内陆地震,2005,19(1):1-7.
[3]付虹,邬成栋,刘强,等.印尼巨大远震引起的云南水位异常记录及其意义[J].地震地质,2007,29(4):873-882.
[4]陈大庆,万永芳,赵明利.北京良乡、赵各庄井水位、水温同震响应对比研究[J].华南地震,2007,27(2):69-75.
[5]措加旺姆,诺桑,白玛,等.拉萨周围地震及小型地震网的建立[J].西藏大学学报,2005,20(3):69-71,80.
[6]杨玉春,李清林.西藏高原地区重力测量与研究[J].华北地震科学,1991,9(4):1-11.
[7]荆燕,张世中,李宏,等.断层垂直形变对强远震的响应[J].地震学报,2007,29(2):165-172.
[8]杨婕,刘水莲,卓群,等.台湾花莲海域强震的同震响应特征[J].华北地震科学,2011,29(3):39-43.
[9]杨婕,占惠,卓群,等.厦门地震台重力仪同震响应特征分析[J].大地测量与地球动力学,2010,30(增):96-99.
[10]邱永平.宁波地震台动水位与垂直摆对汶川8.0级地震的同震变化[J].华北地震科学,2009,27(1):30-33.
[11]段莉莉,胡滨生,李国庆.哈尔滨市延寿地震台竖直摆倾斜仪资料分析[J].华北地震科学,2006,24(4):45-48.
[12]顾申宜,刘阳,张慧,等.海南琼海加积井水位对远大震的同震响应特征研究[J].中国地震,2011,27(1):83-91.
[13]邱桂兰,官致君,杨贤和,等.四川地区地下水位对汶川地震的同震效应[J].华北地震科学,2011,29(2):40-44.
[14]孙毅,程万正.特大远震引起的形变观测变化图像[J].内陆地震.2005,19(3):264-270.
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