Detection and monitoring of ongoing aseismic slip in the Tokai region, Central Japan
Detection and monitoring of ongoing aseismic slip in the Tokai region, Central Japan
复制标题
DOI：
10.1126/science.1076780
复制
发表时间：
2002-11-01
期刊：
影响因子：
56.9
通讯作者：
Nishimura, T
中科院分区：
文献类型：
--
作者：
Ozawa, S;Murakami, M;Nishimura, T
对全球定位系统数据的分析表明，在过去的18个月里，日本东海地区（地震间隙区）的地壳变形率发生了变化。卡尔曼滤波分析显示，东海西部以滨马湖为中心的板块边界发生地震滑动，与东海震源预测区相邻。2002年6月累计矩震级达到6.7级，1月以来哈曼湖东北部相对滑动量增加。东海西部地震滑动的存在，支持了1944年东海地震前几天抬升的无声事件假说。
Analysis of global positioning system data shows that the rate of crustal deformations in the Tokai region of Japan, a seismic gap area, changed over the past 18 months. Kalman filtering analysis shows aseismic slip on the plate boundary in the western Tokai region centered on Lake Hamana, adjacent to the anticipated Tokai earthquake source area. The cumulative moment magnitude reaches 6.7 in June 2002 with a relative slip increase northeast of Lake Haman from January 2002. An existence of aseismic slip in the western Tokai supports the hypothesis of a silent event as the cause of uplifting several days before the 1944 Tonankai earthquake.