Multi-instrument observation on co-seismic ionospheric effects after   great Tohoku earthquake

doi:10.1029/2011JA017036

CORC > 北京大学 > 地球与空间科学学院

	Multi-instrument observation on co-seismic ionospheric effects after great Tohoku earthquake
	Hao, Y. Q. ; Xiao, Z. ; Zhang, D. H.
刊名	journal of geophysical research space physics
	2012
关键词	26 DECEMBER 2004 SUMATRA EARTHQUAKE SURFACE-WAVES TSUNAMI
DOI	10.1029/2011JA017036
英文摘要	In this paper, evidence of quake-excited infrasonic waves is provided first by a multi-instrument observation of Japan's Tohoku earthquake. The observations of co-seismic infrasonic waves are as follows: 1, effects of surface oscillations are observed by local infrasonic detector, and it seems these effects are due to surface oscillation-excited infrasonic waves instead of direct influence of seismic vibration on the detector; 2, these local excited infrasonic waves propagate upwards and correspond to ionospheric disturbances observed by Doppler shift measurements and GPS/TEC; 3, interactions between electron density variation and currents in the ionosphere caused by infrasonic waves manifest as disturbances in the geomagnetic field observed via surface magnetogram; 4, within 4 hours after this strong earthquake, disturbances in the ionosphere related to arrivals of Rayleigh waves were observed by Doppler shift sounding three times over. Two of the arrivals were from epicenter along the minor arc of the great circle (with the second arrival due to a Rayleigh wave propagating completely around the planet) and the other one from the opposite direction. All of these seismo-ionospheric effects observed by HF Doppler shift appear after local arrivals of surface Rayleigh waves, with a time delay of 8-10 min. This is the time required for infrasonic wave to propagate upwards to the ionosphere.; Astronomy & Astrophysics; SCI(E); 10; ARTICLE; 117
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/155724]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Hao, Y. Q.,Xiao, Z.,Zhang, D. H.. Multi-instrument observation on co-seismic ionospheric effects after great Tohoku earthquake[J]. journal of geophysical research space physics,2012.
APA	Hao, Y. Q.,Xiao, Z.,&Zhang, D. H..(2012).Multi-instrument observation on co-seismic ionospheric effects after great Tohoku earthquake.journal of geophysical research space physics.
MLA	Hao, Y. Q.,et al."Multi-instrument observation on co-seismic ionospheric effects after great Tohoku earthquake".journal of geophysical research space physics (2012).