青藏高原东缘重力观测及对芦山M 7.0 地震的反映①.pdf

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第卷第期地震工程学报
35 2
年月
2013 6 CHINA EARTHQUAKE ENGINEERING JOURNAL June,2013
青藏高原东缘重力观测及对芦山地震的反映
①
梁伟锋,刘芳,徐云马,祝意青,郭树松,赵云峰,刘练
中国地震局第二监测中心陕西西安
( , 710054)
摘要
:介绍了青藏高原东缘地区相对重力与绝对重力的观测情况,系统分析了该区域2010以来的
区域重力场变化及其与2013年4 月 。结果表明:(1)芦山
,芦山地震发生在沿龙门山断裂带南段的重力变化高梯度
带的转弯部位;(2)芦山地震距2008年汶川地震不到100km,芦山震中及汶川地震震中均处于重
力变化四象限中心,表明汶川地震震后恢复调整变化对芦山地震具有促进作用;(3)基于流动重力
,尤其是地点预测。
关键词:青藏高原东缘;重力测量;重力变化;芦山地震;中期预测
中图分类号文献标志码文章编号
: :A :1000-0844(2013)02-0266-06
DOI:.1000-
Gravity Observation in the Eastern Margin of Qinghai-Tibetan Plateau
and Reflect to the Lushan
LIANG Wei-feng,LIU Fang,XU Yun-ma,ZHU Yi-qing,
GUO Shu-song,ZHAO Yun-feng,LIU Lian
(Second Monitoring Center,China Earthquake Administration,Xi'an Shannxi 710054,China)
Abstract:With the introduction of observation on relative gravity and absolute gravity in the east-
ern Qinghai-Tibet Plateau,gravity field change of the eastern margin of Tibetan Plateau since
2010and the reflection on the which occurred on April 20,2013in Lushan,Si-
chuan were systematically results showed that:(1)Before the Lushan -
quake,the gravity of the eastern margin of Tibetan Plateau changed drastically,and the Lushan
earthquake occurred in the tu