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日本Ms9.0地震前的重力高频扰动
PRE-SEISMIC GRAVITY DISTURBANCE OF HIGH FREQUENCY BEFORE Ms9.0 EARTHQUAKE IN JAPAN
【摘要】 选取中国重力台网14台gPhone弹簧重力仪组成2个观测剖面,对日本本州东海岸附近海域Ms9.0特大地震前(3月1日至10日)的观测数据进行了分析。结果表明:沿海各台站统一出现了喇叭口状的"重力异常扰动"现象,且扰动异常随震中距的增加呈衰减趋势。
【Abstract】 We have chosen fourteen gPhone spring gravimeters of China Gravity Network to form two observation sections,and analyzed the observation records(in March 1 to10) before the M s9.0 earthquake near Japan east coast.The results indicate that a kind of bell-like of abnormal gravity disturbance occurring at all littoral observation stations and the magnitude of abnormal gravity disturbance attenuate with the distance from epicenter.
【关键词】 日本地区;
Ms9.0地震;
地震重力台网;
gPhone重力仪;
震前重力高频扰动;
【Key words】 near Japan east coast; M s9.0 earthquake; earthquake gravity network; gPhone gravimeter; fore-seismic gravity high frequency disturbance;
【Key words】 near Japan east coast; M s9.0 earthquake; earthquake gravity network; gPhone gravimeter; fore-seismic gravity high frequency disturbance;
【基金】 全国重力台网学科中心运行经费(201101008);中国地震局地震研究所所长基金(IS200956045)
- 【文献出处】 大地测量与地球动力学 ,Journal of Geodesy and Geodynamics , 编辑部邮箱 ,2011年02期
- 【分类号】P315.726
- 【被引频次】20
- 【下载频次】146