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标题：ULF impulsive magnetic response at mid-latitudes to lightning activity
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作者：A. Schekotov ; V. Pilipenko ; K. Shiokawa 等
期刊名称：Earth, Planets and Space
电子版ISSN：1880-5981
出版年度：2011
卷号：63
期号：2
页码：119-128
DOI：10.5047/eps.2010.12.009
出版社：Springer Verlag
摘要：Induction magnetometer data from the mid-latitude station Moshiri (geomagnetic latitude 35.6°) has been examined in search of a transient ULF response to the regional lightning activity.For many events, besides the main impulse produced by the lightning discharge, a secondary impulse delayed about 1 sec was observed.These secondary echo-impulses are probably caused by the partial reflection of wave energy of the initial lightning pulse from the upper boundary of the ionospheric Alfven resonator in the topside ionosphere.The modeling with artificial signals has shown that a multi-band spectral resonant structure (SRS) can be formed owing to the occurrence of paired pulses in analyzed time series.The statistical superposed epoch method indeed has revealed a dominance of two-pulse structure in the magnetic field background during the periods of the SRS occurrence. Key words Lightning Pc1 waves ionosphere Alfven resonator spectral resonant structure.
关键词：Lightning ;Pc1 waves ;ionosphere ;Alfven resonator ;spectral resonant structure