摘要
2013年11月23日山东省莱州市发生Ms4.6级地震,该地震发生在沂沭断裂带东侧。该地震序列类型为主余型,但是地震序列的h值小于1。根据地震的等震线长轴、震源机制解和地质资料分析认为发震断层呈NE向。该地震打破了华北地区6个月的ML4级地震平静,可能预示着华北地区中强地震活动复苏,拉开华北地区中强地震活动序幕,对华北地区6级地震具有指示意义。此外,该地震是1995年苍山Ms5.2级地震后,山东内陆地区发生的最大地震,引起了广泛的政府和社会关注,具有重要的社会影响。
On November 23rd, 2013, an Ms4.6 earthquake occurred on the eastern side of the Yi-Shu fault zone, Laizhou, Shandong province. The earthquake sequence was main-shock-after-shock type, but the h value of the sequence was less than one. According to the analyses of major axis direction of isoseismal curve, focal mechanism solution and geology data, we propose that the seismogenie structure of the event is NE-trending fault. The event ended the seismic quiescence of ML 4 in North China which has lasted for more than 6 months. It may indicate the revival of medium-strong earthquakes in North China, and has indicative significance for earthquakes of M6 in North China. What＇ s more, this is the largest earthquake after Cangshan Ms5.2 earthquake at Shandong inland area. So it attracts wide attention of the government and the society, and has important social effects.
出处
《防灾科技学院学报》
2014年第3期46-52,共7页
Journal of Institute of Disaster Prevention
基金
山东省地震局合同制项目(14Y05)
关键词
莱州地震
沂沭带
H值
震源机制解
4级地震异常平静
华北地区6级地震
Laizhou earthquake
Yi-Shu fault zone
h value
focal mechanism solution
seismic quiescence of ML 4
earthquake of M6 in North China
