河南范县M_L4.7地震前后的重力变化分析
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摘要
通过使用"LGADJ"软件,分析范县地震前后的重力场变化特征发现:震中附近的重力点值在地震的孕育—发震—震后调整阶段,出现了下降—上升—下降的过程。从重力变化的角度,我们认为,该地震前后的重力变化支持孕震过程的膨胀理论;指出:通过加强观测研究冀鲁豫交界地区重力场变化,不断探索地震破坏机理,为和谐新农村建设提供地震安全保障!
With the software "LGADJ",the variation feature of gravity field before and after the Fan county earthquake is analyzed.The result shows that the variation of gravity value in the station near epicenter represents as a raising-dropping-raising process during the pregnancy,occurrence and aftershock adjustment stages of the earthquake.From the view of gravity field variation,we think that the gravity variation going with this earthquake supports the inflation theory of earthquake gestation process;By strengthening the study on gravitational field change in joint region of Hebei,Shandong and Henan Province,exploring earthquake destroying mechanism,better earthquake safety control for the harmonious new rural reconstruction can be provided.
With the software "LGADJ",the variation feature of gravity field before and after the Fan county earthquake is analyzed.The result shows that the variation of gravity value in the station near epicenter represents as a raising-dropping-raising process during the pregnancy,occurrence and aftershock adjustment stages of the earthquake.From the view of gravity field variation,we think that the gravity variation going with this earthquake supports the inflation theory of earthquake gestation process;By strengthening the study on gravitational field change in joint region of Hebei,Shandong and Henan Province,exploring earthquake destroying mechanism,better earthquake safety control for the harmonious new rural reconstruction can be provided.
引文
陈素改,陈绍绪,姚玉致,李光振.1996.华北平原沉地区重力场变化分析[J].华北地震科学,14(1):32～33
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李瑞浩.1988.重力学引论[M].北京:地震出版社,14～15
梅世蓉.1993.地震科学研究论文选集[M].北京:地震出版社,151～152,381～388
秦建增,李清林,郭德科等.2007.河南范县ML4.3地震前后的重力场变化与预报过程[J].西北地震学报,29(4):382～383
孙少安,项爱民,李辉.1999.滇西和北京区域重力场演化及其与地震关系的探讨[J].地震,19(1):99～105
张晶,孟国杰.1996.首都圈地区重力变化及映震能力[J].地震地磁观测与研究,17(2):62～63
郑金涵,宋胜合,刘克人,卢红艳,郭宗汾.2003.利用重力资料反演京津唐张地区震质中[J].地震学报,25(4):422～423
Kreemer C,Holt WEand Gaines AJ.2003.Anintegrated global modle of present-day plate motions and plate boundary de-formatio[J].Geophys J Int,154,8～34
Chen Y T,Gu H D,Lu Z X.1979.Variation of gravity before and after the Haicheng earthquake1975and Tangshan earth-quake1976[J].Phys Earth Planet,18,330～338
陈运泰,顾浩鼎,卢造勋.1980.1975年海城地震与1976年唐山地震前后的重力变化[J].地震学报,2(1):21～29
冯建林,赵兵.2006.河南范县ML4.3地震前后重力异常探讨[J].华北地震科学,24(4):30～31
胡聿贤.2001.地震安全性评价技术教程[M].北京:地震出版社,71
李瑞浩.1988.重力学引论[M].北京:地震出版社,14～15
梅世蓉.1993.地震科学研究论文选集[M].北京:地震出版社,151～152,381～388
秦建增,李清林,郭德科等.2007.河南范县ML4.3地震前后的重力场变化与预报过程[J].西北地震学报,29(4):382～383
孙少安,项爱民,李辉.1999.滇西和北京区域重力场演化及其与地震关系的探讨[J].地震,19(1):99～105
张晶,孟国杰.1996.首都圈地区重力变化及映震能力[J].地震地磁观测与研究,17(2):62～63
郑金涵,宋胜合,刘克人,卢红艳,郭宗汾.2003.利用重力资料反演京津唐张地区震质中[J].地震学报,25(4):422～423
Kreemer C,Holt WEand Gaines AJ.2003.Anintegrated global modle of present-day plate motions and plate boundary de-formatio[J].Geophys J Int,154,8～34
Chen Y T,Gu H D,Lu Z X.1979.Variation of gravity before and after the Haicheng earthquake1975and Tangshan earth-quake1976[J].Phys Earth Planet,18,330～338
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