A non-universal aspect in the temporal occurrence of earthquakes

被引:9
作者
Zhao, Xiaoxue [1 ,2 ]
Omi, Takahiro [1 ]
Matsuno, Nanae [1 ]
Shinomoto, Shigeru [1 ]
机构
[1] Kyoto Univ, Dept Phys, Grad Sch Sci, Sakyo Ku, Kyoto 6068502, Japan
[2] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
来源
NEW JOURNAL OF PHYSICS | 2010年 / 12卷
关键词
HEAVY TAILS; SEISMICITY; CALIFORNIA; IRREGULARITY; VARIABILITY; SPIKING; NEURONS; MODELS;
D O I
10.1088/1367-2630/12/6/063010
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
It has been emphasized that the temporal occurrence of earthquakes in various spatial areas and over ranges of magnitude may be described by a unique distribution of inter-earthquake intervals under suitable rescaling, implying the presence of a universal mechanism governing seismicity. Nevertheless, it is possible that some features in the fine temporal patterns of event occurrences differ between spatial regions, reflecting different conditions that cause earthquakes, such as relative motion of tectonic plates sharing a boundary. By abstracting the non-Poissonian feature from non-stationary sequences using a metric of local variation of event intervals Lv, we find a wide range of non-Poissonian burstiness present in the temporal event occurrences in different spatial areas. Firstly, the degree of bursty features in the occurrence of earthquakes depends on spatial location; earthquakes tend to be bursty in areas where they are less frequent. Secondly, systematic regional differences remain even if the overall correlation between burstiness and the rate of event occurrence is eliminated. Thirdly, the degree of burstiness is particularly high on divergent tectonic boundaries compared to convergent and transform boundaries. In this way, temporal patterns of event occurrences bear witness to the circumstances underlying event generation.
引用
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页数:10
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