caa a22 4500 445301155 CHVBK 20180317142558.0 cr unu---uuuuu 170323e20101101xx s 000 0 eng 10.1007/s11430-010-4046-4 doi (NATIONALLICENCE)springer-10.1007/s11430-010-4046-4 Abnormal perturbations in the ionospheric F2 region before Wenchuan earthquake on 12 May 2008 [Elektronische Daten] [Tong Xu, YanLi Hu, Jian Wu, ZhenSen Wu, YuCheng Suo, Jian Feng, ChaoJun Huang] On 12 May 2008 at 14:28 BJT, a great earthquake (M=8.0) occurred in Wenchuan (31.00°N, 103.40°E), China. The hourly foF2 from 5 to 12 May have been analyzed over four ionospheric observatories: Kunming (25.00°N, 102.70°E), Chongqing (29.50°N, 106.40°E), Lhasa (29.63°N, 91.17°E), and Lanzhou (36.07°N, 103.87°E). The results show that foF2 were notably abnormal from upper bound (the maximum abnormality up to 65% at 17:00 BJT) and lasted about 3 h on 9 May over Chongqing station. Moreover, there were obvious perturbations of foF2 on the same day over other stations except Lhasa. Taking into account that the solar activity and geomagnetic activity were very quiet during this period, we can conclude that the observed positive ionospheric perturbations were likely associated with the imminent earthquake. Science China Press and Springer-Verlag Berlin Heidelberg, 2010 ionospheric perturbations nationallicence earthquake precursors nationallicence seismo-ionospheric coupling nationallicence Xu Tong National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, 266107, Qingdao, China aut Hu YanLi National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, 266107, Qingdao, China aut Wu Jian National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, 266107, Qingdao, China aut Wu ZhenSen School of Science, Xidian University, 710071, Xi'an, China aut Suo YuCheng National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, 266107, Qingdao, China aut Feng Jian National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, 266107, Qingdao, China aut Huang ChaoJun Department of Physics, Shaanxi University of Technology, 723001, Hanzhong, China aut Science China Earth Sciences SP Science China Press 53/11(2010-11-01), 1671-1674 1674-7313 53:11<1671 2010 53 11430 https://doi.org/10.1007/s11430-010-4046-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-4046-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Xu Tong National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, 266107, Qingdao, China aut NATIONALLICENCE 700 1- Hu YanLi National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, 266107, Qingdao, China aut NATIONALLICENCE 700 1- Wu Jian National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, 266107, Qingdao, China aut NATIONALLICENCE 700 1- Wu ZhenSen School of Science, Xidian University, 710071, Xi'an, China aut NATIONALLICENCE 700 1- Suo YuCheng National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, 266107, Qingdao, China aut NATIONALLICENCE 700 1- Feng Jian National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, 266107, Qingdao, China aut NATIONALLICENCE 700 1- Huang ChaoJun Department of Physics, Shaanxi University of Technology, 723001, Hanzhong, China aut NATIONALLICENCE 773 0- Science China Earth Sciences SP Science China Press 53/11(2010-11-01), 1671-1674 1674-7313 53:11<1671 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer