경희대학교 BK21

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관심있는 분들의 많은 참여를 바랍니다.
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● 날짜 : 2016년 08월 24일 (수요일)
● 시간 : 16시 30분
● 장소 : 천문대 영상실
● 강사 : Prof. Lou-Chang Lee (Institute of Earth Sciences-Academia Sinica)
 
Title : Earthquake Precursor Observations in Taiwan and an Electric Coupling Model of Lithosphere, Atmosphere and Ionosphere
 
Abstract :
In the search of earthquake precursors in the Taiwan area, there have been continuous measurements of the gravity, geomagnetic perturbation, crustal deformation, ionospheric disturbance, ground water level, and leaky gas (Radon) from the crust in the past two decades. Since 2010, the gamma-ray sensors, downhole strainmeters, telluric electric field measurements and thermal infrared ray analysis are further established. In addition, an electric coupling model for the lithosphere-atmosphere-ionosphere was developed. A three-dimensional ionosphere simulation code (SAMI3) is used to study the ionosphere dynamics. The simulation results show that a dynamo current density of 1-100 in an earthquake fault zone can cause 1-20% variations of the total electron content (TEC). In this talk, some important results from the integrated observations and theoretical models for pre-earthquake signals will be presented.