Statistical Estimation of the Seismicity Level Change around Hokkaido, Northern Japan
Statistical Estimation of the Seismicity Level Change around Hokkaido, Northern Japan
复制标题
日本北部北海道周边地震活动度变化的统计估算
DOI：
10.1007/s00024-018-1776-2
复制
发表时间：
2018
影响因子：
2
通讯作者：
Saltykov Vadim
中科院分区：
文献类型：
--
作者：
Voropaev Petr;Takahashi Hiroaki;Saltykov Vadim
采用地震活动性水平统计估计（SESL ' 09）方法，对日本北部北海道附近两个地震活动性带的地震活动性变化进行了研究。分析了日本气象厅1960 - 2013年提供的震源数据。太平洋板块俯冲和阿莫里亚板块汇聚形成的两个地理位置不同的地震带，其地震活动性表现出不同的统计特征。两个带之间的低互相关值也表明每个区域的地震过程是独立的。然而，在1996年至2000年期间发现了一个异常高的相互相关期，时间滞后为8周。1994年10月4日，在太平洋一侧观测到最强的北海道东冲地震（Mj8.2）之前有6个月的地震平静期。
The temporal seismicity change in two seismically active zones around Hokkaido, northern Japan was investigated using the statistical estimate of the seismicity level (SESL’09) procedure. Hypocenter data provided by the Japan Meteorological Agency from 1960 to 2013 were analyzed. The seismicity of two geographically different zones, formed by Pacific Plate subduction and Amurian Plate convergence, showed different statistical characteristics. Low cross-correlation values between the two zones also suggest independent seismic processes for each area. However, an anomalously high cross-correlation period was identified from 1996 to 2000, with a time lag of 8 weeks. A 6-month seismic quiescence period before the strongest Hokkaido Toho-Oki Earthquake (4 October 1994,Mj8.2) was observed on the Pacific side.