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Accession number;03A0714640
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| Title;STUDY ON SEISMO-ATMOSPHERIC DISTURBANCES BY USING WAVELET ANALYSIS. |
| Author;
SAKATA HIROSHI
(Tokyo Gakugei Univ.)
HIRUTA KOTARO
(Tokyo Gakugei Univ.)
FUJIWARA HIRONOBU
(Waseda Univ., School of Sci. & Engineering, JPN)
KAMOGAWA MASASHI
(Tokyo Gakugei Univ.)
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Journal Title;Bulletin of Tokyo Gakugei University. Section 4. Mathematics and Natural Sciences
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Journal Code:G0326A
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ISSN:0371-6813
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VOL.55;NO.;PAGE.29-34(2003)
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| Figure&Table&Reference;FIG.8, TBL.3, REF.7 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;We investigated atmospheric disturbances associated with earthquakes by measuring anomalous transmission of VHF electromagnetic waves. The VHF electromagnetic waves scattered by the atmospheric or ionospheric disturbances beyond the line-of-sight distance could be observed through our one-year observation. For our analysis, we used one data a day that was derived by the variation of the amplitude of the received VHF electromagnetic waves during the midnight. When we compare the variation of such a one-day data with the upper bound derived by the previous 14-days running median of the one-day data and the associated inter-quartile range, some signatures over the upper bound might appear a few days before M.GEQ.4.8 earthquakes that occur between transmitter and receiver. We finally obtained 10 signals that appeared a few days before 15 earthquakes with M.GEQ.4.8. (author abst.) |
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