2 0 0 0 OA 小松空港における冬季雷日数と航空機被雷の長期統計解析
- 著者
- 鈴木 智幸 平野 竜貴 谷口 泰也 木村 貴光
- 出版者
- 日本大気電気学会
- 雑誌
- Journal of Atmospheric Electricity (ISSN:09192050)
- 巻号頁・発行日
- vol.41, no.1, pp.1-10, 2022 (Released:2022-06-16)
- 参考文献数
- 10
2 0 0 0 OA 連続ウェーブレット変換を用いた見通し内VHF 帯伝搬異常と地震との統計的関連性
- 著者
- Tomoki Higuchi Nozomi Haga Kuniyuki Motojima
- 出版者
- 日本大気電気学会
- 雑誌
- Journal of Atmospheric Electricity (ISSN:09192050)
- 巻号頁・発行日
- vol.34, no.2, pp.87-100, 2014 (Released:2014-08-28)
- 参考文献数
- 10
Recently, electromagnetic phenomena associated with earthquakes have gotten a lot of attention. So, we have been observed VHF band propagation for long timeand analyzed statistical relation between anomalous line-of-sight propagation in the VHF band and occurrences of earthquakes using quantitative evaluation. Now, we need to detect the anomalous propagation from received data. Therefore, we used a statistical analysis to judge anomalous propagation in a previous study. In this paper, we judged the anomalous propagation by continuous wavelet transform and evaluated the relationship with earthquakes. Furthermore, we introduced hit rate and alarm rate to simplify the relationship between anomalous propagation and earthquakes. As a result, relation between anomalous propagation and earthquakes became clear.
1 0 0 0 OA 放射線モニタリングポストにおける空間線量増加と地震発生の統計的関連性
- 著者
- 大澤 祐輝 小倉 佑哉 本島 邦行
- 出版者
- 日本大気電気学会
- 雑誌
- Journal of Atmospheric Electricity (ISSN:09192050)
- 巻号頁・発行日
- vol.38, no.1, pp.11-21, 2019 (Released:2020-04-16)
- 参考文献数
- 12
1 0 0 0 房総半島における大気電気パラメータの観測
1 0 0 0 ラジオダクト及び見通し内VHF帯伝搬異常と地震との統計的関連性
- 著者
- 大曽根 暖 小川 潤也 羽賀 望 本島 邦行
- 出版者
- 日本大気電気学会
- 雑誌
- Journal of atmospheric electricity (ISSN:09192050)
- 巻号頁・発行日
- vol.33, no.2, pp.115-125, 2013-08-01
- 参考文献数
- 16
- 被引用文献数
- 1
In our previous paper, statistical relation between anomalous line-of-sight propagation in the VHF band and occurrences of earthquakes was presented. Basically, the anomalous propagation is mainly caused by anomalous refractive index of low atmosphere. In the present paper, the anomalies of the refractive index is captured by both the direct observation of radio ducts and the anomalous propagation in the VHF band, and the relation between them and the earthquakes are statistically clarified. Furthermore, the influences of meteorological conditions, which may disperse the anomalies of refractive index in the low atmosphere, are discussed. As a result, relation between anomalous propagation and earthquakes became increasingly clear by using anomalous propagation that concurrent with S-type ducts and meteorological conditions, wind velocity.
- 著者
- Kyosuke Ishii Syugo Hayashi Fumiaki Fujibe
- 出版者
- 日本大気電気学会
- 雑誌
- Journal of Atmospheric Electricity (ISSN:09192050)
- 巻号頁・発行日
- vol.34, no.2, pp.79-86, 2014 (Released:2014-08-28)
- 参考文献数
- 24
- 被引用文献数
- 2 20
The temporal and spatial distributions of cloud-to-ground (CG) lightning in and around Japan were examined for a seven-year period (2002?2008) by using lightning location data from the Lightning Detection Network System operated by the Japan Meteorological Agency. The frequency of CG flashes was found to be high over land area in summer. During winter, many CG flashes were located along the coast of the Sea of Japan of central Honshu (Hokuriku area) and off the coast of the Pacific side (Kanto-Tokai area). A detailed analysis of the Hokuriku and Kanto-Tokai areas revealed diurnal variations characterized by a peak in the afternoon for inland areas, and a peak in early morning for coastal and offshore areas of the Hokuriku area in summer. For winter, the diurnal variation of CG flash density is indistinct in the Hokuriku region, where CG flashes are strongly concentrated within 20 km from the coastline, whereas it has a maximum in the early morning off the coast of the Kanto-Tokai area.