1812年尼勒克地震的宏观震中位置研究  

RESEARCH OF THE MACRO-EPICENTER LOCATION ON 1812 NILKA EARTHQUAKE

作　　者：尹光华[1] 蒋靖祥[1] 吴国栋[1] 

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2009年第4期424-429,共6页Inland Earthquake

基　　金：国家自然科学基金(40562001;40864003)课题资助

摘　　要：微观震中是震源在地表的投影,宏观震中是极震区的几何中心,不同的定义造成位置的差异,大地震的差异比较大,断裂产状也是导致震中位置差异的主要影响因素。据历史记载确定的1812年地震的宏观震中,侧重人居环境,震中位置偏西,初步考察受条件限制也存在一定误差。近年的研究取得了新进展,在尼勒克谷地东部新发现了该地震造成的地质灾害,包括了40 km的形变带,19km的地震断层。根据修正的等震线图,极震区的几何中心在北纬43°45,′东经83°34′。The microcosmic-epicenter is the ground projection of focus, and macro-epicenter is the geometric center of the meizoseismal region. The different definitions result in the difference of position. The difference of large earthquake is bigger and the faults＇ occurrences are main influence factor of this difference. The macro-epicenter of 1812 earthquake, based on the historical record, emphasizes particularly on residing environment and is leaning to the west. The existing errors can also be attributed to the limit of the initial investigation condition. In recent years, some new progress has been made. In the east of Nilka valley, the geological disasters phenomenon caused by the 1812 earthquake is discovered newly. It includes 40km deformation zone and 19 km earthquake faults. Ac.cording to the revised isoseismal map, the geometric center of the meizoseismal legion is located at N43°45′, E83°34′.

关 键 词：1812年尼勒克地震 微观震中 宏观震中位置 地震地质灾害 等震线图 

分 类 号：P315.2[天文地球—地震学]