GPS测定的2011年日本9.0级地震的中国大陆地区同震位移场
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摘要
利用陆态网络东北地区的6个GPS基准站地震期间的观测数据反演了日本本州东海岸9.0级强震区域地表的瞬时形变过程,应用160多个陆态网络基准站以及IGS跟踪站的GPS观测数据解算获得中国大陆地区的远场同震位移。将测站按照中国大陆主要构造带(区)进行分配统计可知,东北地区同震位移最大,平均接近20mm;首都圈与郯-庐带及周围地区平均同震位移也在10mm左右;距离震中比较远的鄂尔多斯及周围、阿尔金-祁连山-阿拉善、新疆等地区也受到了该地震的影响,在东方向发生了5mm左右的位移,并且以上地区的优势方向都为东方向;而本次地震对中国的华南(包括南海)以及青藏等地区基本没有影响。这些解算结果对进一步研究地震动力学特征及判定未来地震趋势提供了详实的实测依据。
The Mw 9.0 Japan Earthquake occurred in east coast of Japan in March 11,2011.Surface deformation process of Northeast area of China is inversed with the data of 6 GPS stations from CMONOC.Far-field cosesimic displacement filed of continental area of China is determined with the data of 160 GPS stations of CMONOC.The results indicate that cosesimic displacement of NorthEast area of China is the largest,on the average close to 20 mm,the average cosesimic displacement of Beijing and surrounding area is close to 10 mm,far-field area average is close to 5 mm,the major direction is east.This earthquake has no effect on South China(including the South China Sea) and the Qinghai-Tibet area of China.The results will be helpful for the research of dynamic characteristic of earthquakes and determination of the tendency of future earthquakes.
The Mw 9.0 Japan Earthquake occurred in east coast of Japan in March 11,2011.Surface deformation process of Northeast area of China is inversed with the data of 6 GPS stations from CMONOC.Far-field cosesimic displacement filed of continental area of China is determined with the data of 160 GPS stations of CMONOC.The results indicate that cosesimic displacement of NorthEast area of China is the largest,on the average close to 20 mm,the average cosesimic displacement of Beijing and surrounding area is close to 10 mm,far-field area average is close to 5 mm,the major direction is east.This earthquake has no effect on South China(including the South China Sea) and the Qinghai-Tibet area of China.The results will be helpful for the research of dynamic characteristic of earthquakes and determination of the tendency of future earthquakes.
引文
[1]国家重大科学工程“中国地壳运动观测网络”项目组.GPS测定的2008年汶川Ms8.0级地震的同震位移场[J].中国科学,2008,38(10):1195-1206
[2]王敏,张培震,沈正康,等.全球定位系统(GPS)测定的印尼苏门答腊巨震的远场同震地表位移[J].科学通报,2006,51(3):365-368
[3]殷海涛,张培震,甘卫军,等.高频GPS测定的汶川Ms8.0级地震震时近场地表变形过程[J].科学通报,2010,55(26):2 621-2 626
[4]蔡华.GNSS大网实时数据快速解算方法应用研究[D].武汉:武汉大学,2010
[5]方荣新,施闯,陈克杰,等.GPS地震仪:PANDA软件测试结果与验证[J].武汉大学学报.信息科学版,2011,36(4):453-456
[6]蔡华,赵齐乐,孙汉荣,等.GNSS实时数据质量控制[J].武汉大学学报.信息科学版,2011,36(7):820-824
[7]赖锡安,黄鹂人,徐菊生,等.中国大陆现今地壳运动[M].北京:地震出版社,2004
[2]王敏,张培震,沈正康,等.全球定位系统(GPS)测定的印尼苏门答腊巨震的远场同震地表位移[J].科学通报,2006,51(3):365-368
[3]殷海涛,张培震,甘卫军,等.高频GPS测定的汶川Ms8.0级地震震时近场地表变形过程[J].科学通报,2010,55(26):2 621-2 626
[4]蔡华.GNSS大网实时数据快速解算方法应用研究[D].武汉:武汉大学,2010
[5]方荣新,施闯,陈克杰,等.GPS地震仪:PANDA软件测试结果与验证[J].武汉大学学报.信息科学版,2011,36(4):453-456
[6]蔡华,赵齐乐,孙汉荣,等.GNSS实时数据质量控制[J].武汉大学学报.信息科学版,2011,36(7):820-824
[7]赖锡安,黄鹂人,徐菊生,等.中国大陆现今地壳运动[M].北京:地震出版社,2004
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