Vere-Jones分枝破裂模型和震源过程的相似之处
- 作者：Jiancang ZhuangDun WangMitsuhiro Matsuura
- 会议时间：2014-10-19
- 关键词：地震学 ; 震源过程 ; 分枝破裂模型
- 作者单位：Jiancang Zhuang,Mitsuhiro Matsuura(Institute of Statistical Mathematics,10-3 Midori-cho,Tachikawa,Tokyo 190-8562,Japan)Dun Wang(Earthquake Research Institute,University of Tokyo,1-1-1,Yayoi,Bunkyo-ku,Tokyo 113-0032,Japan)
- 母体文献：2014年中国地球科学联合学术年会论文集
- 会议名称：2014年中国地球科学联合学术年会
- 会议地点：北京
- 主办单位：中国地球物理学会
- 语种：chi
- 分类号：TU4;P63
摘要
Vere-Jones' branching crack model was developed in 1970s.In this model,the earthquake source is regarded as the result from the total population of crack elements in a critical or near-critical branching process,where the crack propagates through a series of steps.At each step,each crack element simply terminates or generates several other crack elements nearby.Regarding the total number of steps (generations) as the duration time and the total number of crack elements as the total energy released,the following similarities are found between earthquake sources and this model:1.The distribution of energies is asymptotically a Pareto distribution (power law) for the critical case,or a tapered Pareto distribution (tapered power law,Kagan distribution) for the subcritical case.2. VJ's branching crack model explains why the EQ magnitude cannot be determined or predicted before the whole source process finishes.3. The number of crack elements at each generation (time step) show similar patterns of earthquake source time functions.