| Presentation | 2004-10-29 A study on the association of ionospheric perturbations with the Tokachi-oki earthquake Shinko MAEKAWA, Masashi HAYAKAWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this work, we examine LF signal anomalies associated with Tokachi-oki earthquake (25 Sep,2003. M=8.3) and Kiihantou-minamioki earthquake(5 Sep,2004, M=7.1). We payed our attention to nighttime fluctua- tion in the LF signals. We found from the data analys that LF signal anomalies associated with each event; spectral intensities in nighttime fluctuation increased with period of 30[min]-3[hour] about 5-8 days before the earthquakes, This spectral intensity in the frequency range of acoustic gravity wave, is compared with the temporal evolution of earthquakes. Then, it is found that there seems to exist a definite correlation between the two, giving a further support to the acoustic channel in the lithosphere-ionosphere coupling. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | earthquakes / VLF/LF subionospheric propagation / ionospheric perturbations |
| Paper # | SANE2004-52 |
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| Committee | SANE |
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| Conference Date | 2004/10/22(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Space, Aeronautical and Navigational Electronics (SANE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A study on the association of ionospheric perturbations with the Tokachi-oki earthquake |
| Sub Title (in English) | |
| Keyword(1) | earthquakes |
| Keyword(2) | VLF/LF subionospheric propagation |
| Keyword(3) | ionospheric perturbations |
| 1st Author's Name | Shinko MAEKAWA |
| 1st Author's Affiliation | The University of Electro-Communications() |
| 2nd Author's Name | Masashi HAYAKAWA |
| 2nd Author's Affiliation | The University of Electro-Communications |
| Date | 2004-10-29 |
| Paper # | SANE2004-52 |
| Volume (vol) | vol.104 |
| Number (no) | 393 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |