Spatial variation of seismic b-values across the NW Himalaya
Spatial variation of seismic b-values across the NW Himalaya
复制标题
喜马拉雅山西北部地震 b 值的空间变化
DOI：
10.1080/19475705.2014.941951
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
C. Singh
中科院分区：
文献类型：
--
作者：
C. Singh
研究了整个喜马拉雅西北部(28°-36°N；72°-81°E)的频率-震级分布。分析包括一组完整的1819次Mb≥2.9级地震，取自国际地震目录(ISC)公报，发生在1964至2010年间。研究区被划分为三个区块(A、B和C)，分别包括克什米尔、坎格拉-尚巴和加赫瓦尔-库曼段。已经确定了每个块的b值，以查看不同段之间的差异。并对全区的频度-震级分布空间图进行了综合研究。检测到b值的显著变化，b的范围从b≈0.6到1.3。研究表明，Kumaun和Kangra-Chamba地区的累积应力都很高，这可能预示着这些地区未来可能发生大地震。
The frequency–magnitude distribution is investigated along the entire north-western Himalaya (28°–36°N; 72°–81°E). The analysis includes a complete set of 1819 earthquakes of Mb ≥ 2.9 taken from the International Seismological Catalogue (ISC) bulletin which occurred between 1964 and 2010. The study area has been divided into three blocks (A, B and C) that include the Kashmir, Kangra–Chamba and Garhwal–Kumaun segments, respectively. The b-value of each block has been determined to see the disparity among the different segments. A comprehensive study of the spatial mapping of frequency–magnitude distribution is also made for the whole area. Significant variations in the b-value are detected with b ranging from b ≈ 0.6 to 1.3. The study shows that the accumulated stresses are high at the Kumaun as well as in the Kangra–Chamba region which may indicate the possibility of future large earthquakes at these locations.