华南地震2001，Vol.21Issue(1)：43-48,6.
1931年南海西沙群岛北6 3/4级地震震中位置与震级的讨论
Discussion on epicenter and magnitude of earthquake (M=6 3/4) in the north of the Xisha Islands of S outh China Sea in 1931
摘要
Abstract
Based on the seismogeological tectonic environment , the intensity record of historical earthquakes and so on, it is discussed on the epicenter and magni tude of the MS6 3/4 earthquake in the north of the Xisha I slands of South C hina Sea occurred on September 21,1931. This earthquake caused intensityⅤin Gu angzhou, Sanshui and Zhongshan , the long axis of isoseismic line with intensity about trends NW.According to the iso-intensity line roughly delineated,it is co njectured that the epicenter location should be moved 110 km to east (at 20°N, 114.1°E),and based on the statistical result of the maximum distance from the epicenter location to isoseismic line with intensityⅤ, the magnitude M S=7.1 of this earthquake determined by Xujiahui observatory in Shanghai should be more reasonable.关键词
震中定位/地震烈度图/震级/发震断裂分类
天文与地球科学引用本文复制引用
魏柏林..1931年南海西沙群岛北6 3/4级地震震中位置与震级的讨论[J].华南地震,2001,21(1):43-48,6.基金项目
广东省自然科学基金项目(粤科基［1997］23) （粤科基［1997］23）
