Ionospheric disturbances triggered by the 11 March 2011 M9.0 Tohoku earthquake

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题名:	Ionospheric disturbances triggered by the 11 March 2011 M9.0 Tohoku earthquake
作者:	Liu,JY;Chen,CH;Lin,CH;Tsai,HF;Chen,CH;Kamogawa,M
贡献者:	太空科學研究所
关键词:	26 DECEMBER 2004;ALASKAN EARTHQUAKE;SURFACE-WAVES;GRAVITY-WAVES;GPS DETECTION
日期:	2011
上传时间:	2012-03-27 17:32:06 (UTC+8)
出版者:	國立中央大學
摘要:	An earthquake of magnitude 9.0 occurred near the east coast of Honshu (Tohoku area), Japan, producing overwhelming Earth surface motions and inducing devastating tsunamis, which then traveled into the ionosphere and significantly disturbed the electron density within it (hereafter referred to as seismotraveling ionospheric disturbances (STIDs)). The total electron content (TEC) derived from nationwide GPS receiving networks in Japan and Taiwan is employed to monitor STIDs triggered by seismic and tsunami waves of the Tohoku earthquake. The STIDs first appear as a disk-shaped TEC increase about 7 min after the earthquake occurrence centered at about 200 km east of the epicenter, near the west edge of the Japan Trench. Fast propagating disturbances related to Rayleigh waves quickly travel away from the epicenter along the main island of Japan with a speed of 2.3-3.3 km/s, accompanied by sequences of concentric circular TEC wavefronts and followed by circular ripples (close to a tsunami speed of about 720-800 km/h) that travel away from the STID center. These are the most remarkable STIDs ever observed where signatures of Rayleigh waves, tsunami waves, etc., simultaneously appear in the ionosphere.
關聯:	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
显示于类别:	[太空科學研究所 ] 期刊論文

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