2022 Fiscal Year Final Research Report
Multidisciplinary studies of lightning for the disaster mitigation on the summit of Mt. Fuji
| Project/Area Number |
20H02419
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 25030:Disaster prevention engineering-related
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| Research Institution | University of Shizuoka |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 雷 / 高高度放電発光現象 / 自然放射線 / 接地 / 大気電場 |
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| Outline of Final Research Achievements |
At Mt. Fuji, we have conducted several studies related to lightning and obtained the following results. A mountain-scale lightning observation system was developed to measure the telluric current flowing through a grounded conductor connected to the root of Mt. Fuji. We detected terrestrial gamma-ray flashes (TGFs) with X-rays generated from stepped leaders in the energic radiation observations of thunderclouds and lightning activity. In the observation of transient luminous events such as sprites, we showed the relationship between the amount of rainfall and the occurrence of sprites. The operation of a newly-designed field mill with wide-range measurements was tested.
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| Free Research Field |
大気電気
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| Academic Significance and Societal Importance of the Research Achievements |
雷放電直近観測および雷放電関連現象を含む全容観測が可能な富士山頂という日本最高峰かつ独立峰の長所を生かした観測により、多種多様な成果を得ることができた。これらの成果が得られたことにより富士山頂という観測点が雷研究の優れたテストフィールドであることを示すことができた。
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