Ionospheric and geomagnetic disturbances caused by the 2008 Wenchuan   earthquake: A revisit

doi:10.1002/2015JA021035

CORC > 北京大学 > 地球与空间科学学院

	Ionospheric and geomagnetic disturbances caused by the 2008 Wenchuan earthquake: A revisit
	Zhao, Biqiang ; Hao, Yongqiang
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2015
关键词	coseismic ionospheric effects atmosphere-ionosphere coupling ionospheric disturbances GRAVITY-WAVES TOHOKU EARTHQUAKE GPS DETECTION ALASKAN EARTHQUAKE SUMATRA EARTHQUAKE OKI EARTHQUAKE PACIFIC COAST PROPAGATION TSUNAMI DEPENDENCE
DOI	10.1002/2015JA021035
英文摘要	Previous works have shown that coseismic ionospheric disturbances (CIDs) after the tsunamigenic 2011 Tohoku earthquake (Tohoku EQ, M(w)9.1) covered a vast area and were observed thousands of kilometers away from the epicenter. For the purpose of making a comprehensive comparison between powerful oceanic and inland EQs, we conduct a retrospective investigation of CIDs and geomagnetic responses to the 2008 Wenchuan EQ (M(w)7.9) using a combination of techniques, total electron content, HF Doppler, and ground magnetometer. It is the very first study to present CIDs recorded by different techniques at co-located sites and profiled with regard to changes of both ionospheric plasma and current (geomagnetic field) simultaneously. The integrated observation also shows that (1) in the Wenchuan case, most of the ionospheric and geomagnetic disturbances were observed within 1000km distance which is far less than the Tohoku case; (2) two groups of CIDs were found with maximum amplitudes in the direction of azimuth 150 degrees and 135 degrees, respectively; and (3) the geomagnetic changes were only registered by three magnetometers located to the east and southeast of the epicenter. All the facts indicate that the main directional lobe of Wenchuan EQ energy propagation is to southeast and perpendicular to the direction of the fault rupture, but this kind of directivity is not that distinct in the Tohoku case. We suggest that the different fault slip (inland or submarine) affecting the way of couplings of lithosphere with atmosphere may contribute to the discrepancies between the two events.; National Basic Research Program of China [2012CB957801, 2011CB811405]; NSFC [41274155, 41174138, 41131066, 41304126]; ISTCP [2014DFR21280]; Young Talent Program of Chinese Academy of Science; SCI(E); ARTICLE; hao@pku.edu.cn; 7; 5758-5777; 120
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/418652]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhao, Biqiang,Hao, Yongqiang. Ionospheric and geomagnetic disturbances caused by the 2008 Wenchuan earthquake: A revisit[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2015.
APA	Zhao, Biqiang,&Hao, Yongqiang.(2015).Ionospheric and geomagnetic disturbances caused by the 2008 Wenchuan earthquake: A revisit.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS.
MLA	Zhao, Biqiang,et al."Ionospheric and geomagnetic disturbances caused by the 2008 Wenchuan earthquake: A revisit".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS (2015).