作者:Tang, L (Tang Long)^{[ 1 ]} ; Guo, BF (Guo Bo-Feng)^{[ 2 ]} ; Li, Z (Li Zhe)^{[ 3 ]}

CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION

卷: 60 期: 2页: 507-513

DOI: 10.6038/cjg20170206

出版年: FEB 2017

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摘要

Tsunami waves can produce atmospheric gravity waves and thus perturb the ionosphere. In this study, we use the GPS total electron content data in Japan to detect the ionospheric disturbances triggered by the Tohoku tsunami that occurred on 11 March 2011. The results show that there are two types of gravity waves in the ionosphere over Japan, which is produced by the tsunami waves and the seismic rupture process, respectively. The earthquake-driven ionospheric gravity waves are distributed around the epicenter (including the areas over and far from the ocean) whereas the tsunami-driven ionospheric gravity waves are observed above the ocean. The earthquake-driven ionospheric gravity waves have different horizontal velocities, including about 210 m . s(-1) and 170 m . s(-1), and frequency of about 1. 5 mHz. The tsunami-driven ionospheric gravity waves have velocity of about 280 m . s(-1), which are faster than that of the earthquake-driven ionospheric gravity waves, and frequency of about 1. 0 mHz. In addition, the tsunami-driven ionospheric gravity waves have similar propagation characteristics to the causative tsunami waves in terms of horizontal velocity, direction, travel time, waveform and frequency. This study distinguishes the tsunami signals in ionosphere from ionospheric disturbances triggered by the earthquake event and confirms again that the ionosphere is sensitive to tsunami waves.

关键词

作者关键词:GPS; Total electron content; Ionospheric disturbances; Atmospheric gravity waves;Tsunami

KeyWords Plus:GRAVITY-WAVES

作者信息

通讯作者地址: Tang, L (通讯作者)

地址:

电子邮件地址:ltang@whu.edu.cn

出版商

SCIENCE PRESS, 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA

类别/分类

研究方向:Geochemistry & Geophysics

Web of Science类别:Geochemistry & Geophysics

文献信息

文献类型:Article

语种:Chinese

入藏号: WOS:000394412200006

ISSN: 0001-5733

期刊信息

· Impact Factor (影响因子): 0.984