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Evidence for diurnal periodicity of earthquakes from midnight to daybreak

文献类型：期刊论文

作者Hao, Jinlai; Zhang, Jinhai; Yao, Zhenxing
刊名NATIONAL SCIENCE REVIEW
出版日期2019-09-01
卷号6期号:5页码:1016-1023
ISSN号2095-5138
关键词periodicity of earthquakes time-frequency analyses ocean tide earth tide Local Mean Time
DOI10.1093/nsr/nwy117
英文摘要Previously, inadequate earthquake catalogs and the lack of method made it challenging, if not impossible, to determine the dominant period of earthquake occurrence. With the advent of densely distributed seismic stations in Japan since 2002, 410 642 M1.0+ earthquakes have been cataloged under the mainland within 30-km depth, which provide a superb dataset to identify the periodicity of earthquakes. We processed this catalog using time-frequency analyses and daily stacking, which are powerful in extracting weak periodical signal from strong random noises. We concentrated on the time sector from 0:00 to 6:00 (i.e. from midnight to daybreak), which is a reliable time window for much higher detectability of weak earthquakes, since it has the lowest affects from cultural noises. We successfully observed two apparent periodicities of 12- and 24-hour, which are much smaller than the fortnightly periodicity presented previously in the literature. Synthetic earth tides, after intentionally ignoring the contribution from the Moon, present similar dominant periods as the earthquakes. This may indicate that the dominant period of earthquakes is statistically associated with the Sun rather than the Moon. The daily stacking number of earthquakes using a 15-minute or 1-hour interval shows a peak around 1:30, rather than usually expected 3:00 to 4:00. In addition, bigger earthquakes show more evident variations in the stacking results, and the trend is very consistent for various lower limits of earthquake magnitude from M1.0 to M4.0. These discoveries settled the disputes on the existence of the periodicity of earthquakes since 1886 and may open a window to unravel the mystery of earthquakes.
WOS关键词EARTH TIDES ; COMPLETENESS MAGNITUDE ; TREMOR ; SENSITIVITY ; MODULATION
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDA17010404] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA15011700] ; National Major Project of China[2017ZX05008-007] ; National Natural Science Foundation of China[41574058]
WOS研究方向Science & Technology - Other Topics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000512966500029
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/95680]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Zhang, Jinhai
作者单位Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Hao, Jinlai,Zhang, Jinhai,Yao, Zhenxing. Evidence for diurnal periodicity of earthquakes from midnight to daybreak[J]. NATIONAL SCIENCE REVIEW,2019,6(5):1016-1023.
APA Hao, Jinlai,Zhang, Jinhai,&Yao, Zhenxing.(2019).Evidence for diurnal periodicity of earthquakes from midnight to daybreak.NATIONAL SCIENCE REVIEW,6(5),1016-1023.
MLA Hao, Jinlai,et al."Evidence for diurnal periodicity of earthquakes from midnight to daybreak".NATIONAL SCIENCE REVIEW 6.5(2019):1016-1023.

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来源：地质与地球物理研究所

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