| 2005-2008年北京地区典型重力变化跟踪与分析 |
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| 引用本文： | 陆明勇,;张晶,;李志雄,;刘善华,;寇建新,;张成强,;孙柏成.2005-2008年北京地区典型重力变化跟踪与分析[J].地震地磁观测与研究,2014(1):156-164. |
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| 作者姓名： | 陆明勇 ;张晶 ;李志雄 ;刘善华 ;寇建新 ;张成强 ;孙柏成 |
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| 作者单位： | [1]中国地震应急搜救中心,中国北京100049; [2]中国地震局地震预测研究所,中国北京100036 |
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| 基金项目： | 首都圈震情短临跟踪暨奥运保障项目、“十二五”国家科技支撑计划项目（2012BAK1980202）、地震行业专项（201108009,201008012）等资助 |
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| 摘 要： | 自2006年起，北京地区一些流动重力测点测值在趋势变化的基础上加速变化，昌平和顺义等测点附近重力场非均匀性变化增强。以北京昌平重力观测点为中心增加2条重力剖面观测线，并进行3期观测，分析重力场演化特征，采用地下水重力效应经验公式、自由空气改正关系式，分别改正地下水位、地壳形变对重力典型变化点的影响。研究表明：重力变化是地下水位、地壳形变影响的结果，重力剖面观测区及附近重力变化比较平稳，变化均在误差范围内，排除该异常是地震前兆异常的可能。
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| 关 键 词： | 重力 地壳形变 地下水位 |
The tracking and analysis of typical gravity change in Beijing during the period of 2005--2008 |
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| Institution: | Lu Mingyong, Zhang Jing, Li Zhixiong, Liu Shanhua, Kou Jianxin, Zhang Chengqiang, Sun Baicheng( 1)China Center for Earthquake Disaster Emergency and SAR, Beijing 100049, China 2) Institute of Earthquake Science, China Earthquake Administration, Beij ing 100036, China) |
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| Abstract: | The mobile gravity measured value had changed on the basis of trend changes in Beij ing since 2006 ,the non-uniformity of the variation of the gravitational field has enhanced in Changping and Shunyi measuring points near region.First,two gravity profiles observation lines to the Beijing Changping gravity observation point were added and three gravity obser-vations was did.Then,the gravity evolution characteristics were analyzed.The influence of the groundwater level and crustal deformation on gravity typical change point was corrected. Finally,it was shown that the gravity change was the influence results of the change of groundwater level and crustal deformation,the gravity profile observation area and its rela-tively gravity change was relatively stable,the gravity change was in its error range,the gravity anomaly wasn′t seismic anomaly in Beijing. |
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| Keywords: | gravity crustal deformation groundwater level |
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