Subdiffusion of volcanic earthquakes
Subdiffusion of volcanic earthquakes
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DOI：
10.1007/s11600-017-0029-6
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发表时间：
2016-07
期刊：
影响因子：
2.3
通讯作者：
S. Abe;N. Suzuki
中科院分区：
文献类型：
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作者：
S. Abe;N. Suzuki
对冰岛火山、埃亚菲亚德拉冰盖和伊亚菲亚德拉火山的火山地震活动性进行了比较研究。从复杂系统科学的观点对西西里的埃特纳进行了研究，发现了它们之间显著的相似性。在这些作为点过程的地震活动中，地震的跳跃概率分布（即，发现两个连续事件的震源之间的距离的分布）服从指数律，而等待时间分布（即，两个连续事件的间隔时间分布）遵循幂律。仔细分析了有限尺寸对等待时间分布的影响，以及以前报道的Mt.埃特纳（Abe and Suzuki 2015）也相应地被重新解释。结果表明，地震区的增长在时间上是subdiffusive在这两个火山。在震源的“事件-时间-平均”均方位移中普遍观察到老化现象。还对过程的（非）马尔可夫性进行了评论。
A comparative study is performed on volcanic seismicities at Icelandic volcano, Eyjafjallajökull, and Mt. Etna in Sicily from the viewpoint of complex systems science, and the discovery of remarkable similarities between them is reported. In these seismicities as point processes, the jump probability distributions of earthquakes (i.e., distributions of the distance between the hypocenters of two successive events) are found to obey the exponential law, whereas the waiting-time distributions (i.e., distributions of inter-occurrence time of two successive events) follow the power law. A careful analysis is made about the finite size effects on the waiting-time distributions, and the previously reported results for Mt. Etna (Abe and Suzuki 2015) are reinterpreted accordingly. It is shown that the growth of the seismic region in time is subdiffusive at both volcanoes. The aging phenomenon is commonly observed in the “event-time-averaged” mean-squared displacements of the hypocenters. A comment is also made on (non-)Markovianity of the processes.