Teleseismic magnetic effects (TMDs) of 2011 Tohoku earthquake

	Teleseismic magnetic effects (TMDs) of 2011 Tohoku earthquake
	Hao, Y. Q.; Xiao, Z.; Zhang, D. H.
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2013
卷号	118 期号:6 页码:3914-3923
关键词	geomagnetic change seismo-ionospheric effect atmosphere-ionosphere coupling
ISSN号	2169-9380
通讯作者	Xiao, Z (reprint author), Peking Univ, Dept Geophys, Beijing 100871, Peoples R China.
英文摘要	Anomalous magnetic variations were observed by ground magnetometers in East Asia area after the 2011 Tohoku earthquake. Some earlier reports showed that the seismo-magnetic variations have obvious amplitude around the epicenter, we emphasis here that the variations can still be notable at stations 2000-4000km away from epicenter, and we define it as teleseismic magnetic disturbances (TMDs). TMDs appear about 8min later after the arrival of seismic Rayleigh waves at teleseismic distances and propagate at a horizontal velocity of 3.90.1km/s. The wave-like TMDs last for no longer than 10min and have a main period of 2.1-3.3min. TMDs are not generated by direct effects of processes in focal area crust or tsunami waves, instead, their properties consist with the Rayleigh wave model of seismo-ionospheric disturbances. Hence, we conclude that the TMDs are the magnetic manifestation of seismotraveling ionospheric disturbances (STIDs) generated by the interaction between the ionosphere and atmosphere through acoustic waves launched by traveling Rayleigh waves. Our findings contribute to the knowledge of seismo-electromagnetic effects in the atmosphere-ionosphere system and further our understanding of couplings between various spheres of the Earth.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/4959]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Hao, Y. Q.,Xiao, Z.,Zhang, D. H.. Teleseismic magnetic effects (TMDs) of 2011 Tohoku earthquake[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2013,118(6):3914-3923.
APA	Hao, Y. Q.,Xiao, Z.,&Zhang, D. H..(2013).Teleseismic magnetic effects (TMDs) of 2011 Tohoku earthquake.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,118(6),3914-3923.
MLA	Hao, Y. Q.,et al."Teleseismic magnetic effects (TMDs) of 2011 Tohoku earthquake".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 118.6(2013):3914-3923.