2023 Fiscal Year Final Research Report

Feasibility Evaluation of Imminent Prediction of Major Earthquakes Based on Wide-Area Electrostatic Field Analysis

Research Project

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Project/Area Number	22K18868
Research Category	Grant-in-Aid for Challenging Research (Exploratory)
Allocation Type	Multi-year Fund
Review Section	Medium-sized Section 25:Social systems engineering, safety engineering, disaster prevention engineering, and related fields
Research Institution	Nagaoka University of Technology
Principal Investigator	Jiang Weihua 長岡技術科学大学, 工学研究科, 教授 (90234682)
Co-Investigator(Kenkyū-buntansha)	太田朋子長岡技術科学大学, 工学研究科, 准教授 (30373020)
Project Period (FY)	2022-06-30 – 2024-03-31
Keywords	安全工学・安全科学 / 環境放射線（能） / 地震災害
Outline of Final Research Achievements	This research focuses on the concentration of radioactive elements in the natural atmosphere environment and its effects on the electrostatic field distribution. The possibility of predicting large-scale earthquakes based on monitoring atmospheric electrostatic field anomalies has been investigated. The research activities and results mainly cover the following. In order to obtain basic information for estimating the amount of radon produced, which is one of the factors in the atmospheric electrostatic field, the measurement of geological and geographical information in and around the Nagaoka area has been carried out. A numerical calculation model was developed and used to quantitatively simulate the ionization effect due to radioactive gas released into the atmosphere. Using this model, the behavior of the wide-area electrostatic field due to surface gas release that occurs immediately before a major earthquake was investigated.
Free Research Field	原子力安全工学
Academic Significance and Societal Importance of the Research Achievements	大地震の直前予知は極めて重要な技術課題である。本研究は、広域静電場の異常分布に着目することにより、大地震の直前予知を目指すものである。大気静電界異常の最大な特徴は、広域現象であることにある。地下ガス放出というミクロ現象が静電界異常というマクロ現象につながり、比較的地震前兆との因果関係として判別し易い。本研究は、従来技術と異なる視点からの挑戦であり、目指す目標は、数多くの地震予知手段の中で、新たなアプローチを追加することにより、少しても地震予知の精度を向上することである。