| Project/Area Number |
18K04129
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21020:Communication and network engineering-related
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| Research Institution | University of Toyama |
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Principal Investigator |
Fujii Masafumi 富山大学, 学術研究部工学系, 准教授 (60361945)
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| Project Period (FY) |
2018-04-01 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2018: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Keywords | 電磁波観測 / VHF / 地表面プラズマ波 / 応力誘起電荷 / 個体電気伝導 / 短期地震予測 / 地殻活動モニタリング / 電磁波解析 / 地表面プラズモン / 電磁波伝搬 / 地殻活動 / 地震活動 / 地震前兆現象 / 地球電磁気学 / 地震発生確率 / FDTD解析 / 深層学習 / 電磁気学 / 電磁相互作用 / フィルタ / 地殻変動 / 表面プラズマ波 / 電磁波 |
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| Outline of Final Research Achievements |
In order to establish a short-term earthquake prediction method based on new principles of electromagnetics, electro-physics and electro-chemistry, we designed and fabricated a narrow-band filter to reduce very high frequency (VHF) band noise, and placed low-noise, high-sensitivity radio wave observation devices at several locations, and successfully detected anomalous radio propagation signals several hours before major earthquakes. We also succeeded in detecting anomalous radio propagation signals several hours before large earthquakes. Furthermore, we clarified the physical mechanism by which anomalous signals are generated in relation to earthquakes through large-scale numerical simulations, and showed that it is possible to monitor crustal activity over a range of several hundred kilometers and to predict earthquakes in the short term.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、地震の発生を数日から数時間前に察知し、その事態に備え、予期せぬ事態を最小化することを目標としている。これまでは地震が突然発生し、不意を突かれることによる不安と災害が極めて大きかったが、数時間前の予測が可能になれば心理的、社会的な安全や減災の効果は極めて大きい。学術的にもこれまで非常に困難とされていた地震の短期予測が可能であることおよびその物理機構を示した意義は小さくない。
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