Japan Geoscience Union Meeting 2014

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Oral

Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS29_29PM2] Electromagnetic phenomena associated with seismic and volcanic activities

Tue. Apr 29, 2014 4:15 PM - 6:00 PM 313 (3F)

Convener:*Tetsuya Kodama(Earth Observation Research Center, Space Applications Mission Directorate, Japan Space Exploration Agency), Jun Izutsu(College of Engineering, Chubu University), Yasuhide Hobara(Graduate School of Information and Engineering Department of Communication Engineering and Informatics, The University of Electro-Communications), Toshiyasu Nagao(Earthquake Prediction Research Center, Tokai University), Chair:Toshiyasu Nagao(Earthquake Prediction Research Center, Tokai University), Tetsuya Kodama(Earth Observation Research Center, Space Applications Mission Directorate, Japan Space Exploration Agency)

4:45 PM - 5:00 PM

[MIS29-10] Study on lithosphere-atmosphere-ionosphere coupling inferred from the data of GPS surface displacement and ionopheric pe

*Yasuhide HOBARA1, Risa MIYAKE1, Chieh-hung CHEN2 (1.Graduate School of Information and Engineering Department of Communication Engineering and Informati, 2.Institute of Earth Sciences, Academia Sinica, Taiwan)

Keywords:ionopheric perturbations, GPS surface displacement, lithosphere-atmosphere-ionosphere coupling, earthquake

Various scenarios of coupling mechanisms between the major seismic activities on the ground and overlaying ionosphere have been proposed, experimental evidence has not been observed clearly. In this paper we analyze long-term data from ground movement and ionospheric anomalies in relation with major earthquakes occurred around Japan. In association with major earthquakes, anomalous surface displacements are observed by dens GPS network whilst lower ionospheric perturbations are identified by continuous measurement of VLF/LF transmitter signals. As a result, we found that the ionospheric anomalies are observed preferably associated with the thrust type earthquakes. GPS surface displacements tend to occur in association with any types of earthquakes.