日本地球惑星科学連合2018年大会

講演情報

[EE] Eveningポスター発表

セッション記号 M (領域外・複数領域) » M-IS ジョイント

[M-IS03] Interdisciplinary studies on pre-earthquake processes

2018年5月24日(木) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:服部 克巳(千葉大学大学院理学研究科)、劉 正彦(国立中央大学太空科学研究所)、Ouzounov Dimitar(Center of Excellence in Earth Systems Modeling & Observations (CEESMO) , Schmid College of Science & Technology Chapman University, Orange, California, USA、共同)、Qinghua Huang(Peking University)

[MIS03-P02] Signal Discrimination for radon variation at Asahi station, Chiba, Japan

*大村 潤平1吉野 千恵1服部 克巳1下 道國2小西 敏春3古屋 隆一4 (1.千葉大学大学院理学研究科、2.藤田保健衛生大学、3.応用光研工業株式会社、4.コムシステム株式会社)

The Ionospheric anomaly is one of the most promising precursory phenomena for large earthquakes. Lithosphere-Atmosphere-Ionosphere Coupling (LAIC) model has been proposed to explain these phenomena. To examine the possibility of the chemical channel of LAIC model through the monitoring of atmospheric electricity parameters, we have installed sensors for the atmospheric electric field (AEF), atmospheric ion concentration (AIC), radon concentration, radon exhalation quantity (REQ), and weather elements. To detect signals related to earthquakes, variations caused by non-tectonic activities should be removed. In this aim, we performed Multi – channel Singular Spectrum Analysis (MSSA) for observed time series of REQ and climatic parameters and investigated correlation among them. By this method, we could extract components which has clear diurnal and semidiurnal variation. We also could discriminate REQ signals related to variation in weather components by evaluate the correlation between them for each component. Then we researched relations between residual REQ variation and crustic activity such as earthquakes or surface deformation. Data observed during different periods should be researched for detail consideration of these relations.