华南地震2016，Vol.36Issue(4)：27-33,7.DOI:10.13512/j.hndz.2016.04.005
2013年莱州MS4.6、2015年乳山MS4.6级地震前后重力场变化特征
Characteristics of Gravity Field Change Before and After Laizhou MS 4.6 Earthquake in 2013 and Rushan MS 4.6 Earthquake in 2015
摘要
Abstract
Using the flow gravity observation data in Shandong survey area from 2009 to 2015,the absolute gravity control,relative gravity conjunction of the classical adjustment method,the paper gives the dynamic image of gravity field in Shandong survey area and systematically analyzes the spatial variation of gravitational field and segment difference change characteristics before and after the Laizhou MS 4.6 earthquake on 23rd November 2013,Rushan MS 4.6 earthquake on 22nd May,2015.Combining with the geological structure and earthquake mechanism characteristics analysis,the paper discusses the relation of characteristic of gravity variation and Laizhou earthquake and Rushan earthquake.The results show that Rushan the zone of Laizhou MS 4.6 earthquake is located at the gravity field variation difference zero line turn areas;the zone of Rushan MS 4.6 earthquake is located at the area with the maximum positive anomaly of gravity field difference.In addition,it can be seen from the cross fault segment difference that the earthquake seismic and gravity difference on both sides the fracture zone inevitably have a significant cumulative rise process with large magnitude and earthquakes generally occur in the transition falls.关键词
莱州地震/乳山地震/重力变化/地质构造Key words
Laizhou earthquake/Rushan earthquake/Gravitational field variation/Geological structure分类
天文与地球科学引用本文复制引用
陆汉鹏,李建奎,王锋吉,张刚..2013年莱州MS4.6、2015年乳山MS4.6级地震前后重力场变化特征[J].华南地震,2016,36(4):27-33,7.基金项目
地震行业科研专项(201508009-12) （201508009-12）
山东地震局合同制项目(15Y116) （15Y116）
