Electromagnetic anomalies associated with 1995 Kobe earthquake
2002; Elsevier BV; Volume: 33; Issue: 4-5 Linguagem: Inglês
10.1016/s0264-3707(02)00004-2
ISSN1879-1670
AutoresToshiyasu Nagao, Yûji Enomoto, Yukio Fujinawa, Masayuki Hata, Masashi Hayakawa, Qinghua Huang, Jun Izutsu, Yoshio Kushida, Kenji Maeda, Kazuo Oike, Seiya Uyeda, Takeo Yoshino,
Tópico(s)Seismology and Earthquake Studies
ResumoOccurrences of anomalous electro-magnetic phenomena at varied frequency ranges, covering ELF to VHF, have been reported in relation to the 17 January 1995 Kobe earthquake (M7.2), by several independent research groups. Prominent pre-seismic peaks, which could have been emitted from the focal area, were observed on 9-10 January in ELF, VLF, LF and HF ranges. Whether these changes were truly related to the earthquake is not certain, because atmospheric (thunderbolt discharge) activities also peaked on 9-10 January. The nomalous changes were markedly enhanced toward the catastrophe in agreement with many reports on unusual radio/TV noise. Anomalous transmission of man-made electromagnetic waves in VLF and VHF ranges was also detected from a few days before the earthquake, indicating the possibility that the ionosphere above the focal zone was disturbed at the final stage of the earthquake preparation process.
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