研究内容

これまでのVLF/LF帯における研究

• 地震電磁気現象とは？
• 地震に伴ったVLF/LF伝搬異常(地圏・大気圏・電離圏結合)
  
  
• 2003年十勝沖地震に伴うVLF/LF帯電波伝搬異常の事例解析
  Results of subionospheric radio LF monitoring prior to the Tokachi (M=8, Hokkaido, 25 September 2003) earthquake, A. V. Shvets, M. Hayakawa, S. Maekawa, NHESS(pdf)
  
  Surface latent heat flux and nighttime LF anomalies prior to the Mw=8.3 Tokachi-Oki earthquake, G. Cervone, S. Maekawa, R. P. Singh, M. Hayakawa, M. Kafatos, and A. Shvets, NHESS(pdf)
  
  ★関連リンク：Measurement of SLHF must for early warning of quakes
  
  
• 2004年紀伊半島沖地震に伴うVLF/LF帯電波伝搬異常の事例解析(IWSE予稿440KB,pdf)

現在行っている研究

• 2004年新潟県中越地震に伴うVLF/LF帯電波伝搬異常の事例解析
• スマトラ地震に伴った下部電離層擾乱について
  
  
• Superimposed epoch analysisを用いた地震に伴ったVLF/LF帯伝搬異常の検出
• 多観測点のVLF/LFデータを用いた夜間変動と地震の関係
  
  
• Termonator timeの統計的な性質
• スケールハイトの温度勾配、Windshareを考慮に入れたAGWの伝搬の研究
• Solor flare,γ-ray burstによる電離層擾乱の研究

資料

• Anomalies of LF signal during seismic activity in November-December 2004,A. A. Rozhnoi, M. S. Solovieva, O. A. Molchanov,M. Hayakawa,S. Maekawa, and P. F. Biagi
• Lithosphere-atmosphere-ionosphere coupling as governing mechanism for preseismic short-term events in atmosphere and ionosphere,O. Molchanov1, E. Fedorov1, A. Schekotov1, E. Gordeev2, V. Chebrov3, V. Surkov1, A. Rozhnoi1, S. Andreevsky1,D. Iudin4, S. Yunga3, A. Lutikov3, M. Hayakawa5, and P. F. Biagi6
  
  
• VLF-LF radio signals collected at Bari (South Italy): a preliminary analysis on signal anomalies associated with earthquakes、P. F. Biagi1, 2, R. Piccolo1, 2, L. Castellana1, T. Maggipinto1, A. Ermini3, S. Martellucci3, C. Bellecci3, G. Perna4,V. Capozzi4, 2, O. A. Molchanov5, M. Hayakawa6, and K. Ohta7
• A possible preseismic anomaly in the ground wave of a radio broadcasting (216 kHz) during July-August 1998 (Italy)、P. F. Biagi1,2, L. Castellana1, T. Maggipinto1, R. Piccolo1, A. Minafra1, A. Ermini3, S. Martellucci3, C. Bellecci3,G. Perna4, V. Capozzi4, O. A. Molchanov5, and M. Hayakawa6