Atmospheric anomalies observed during earthquake occurrences

H. Fujiwara; M. Kamogawa; M. Ikeda; J. Y. Liu; H. Sakata; Y. I. Chen; H. Ofuruton; S. Muramatsu; Y. J. Chuo; Y. H. Ohtsuki

doi:10.1029/2004GL019865

Atmospheric anomalies observed during earthquake occurrences

H. Fujiwara, M. Kamogawa, M. Ikeda, J. Y. Liu, H. Sakata, Y. I. Chen, H. Ofuruton, S. Muramatsu, Y. J. Chuo, Y. H. Ohtsuki

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

74 引文斯高帕斯（Scopus）

摘要

Appearance of anomalies in the atmosphere before earthquakes (EQs) has been verified, through observation of anomalous transmission of VHF electromagnetic (EM) waves beyond line-of-sight. Anomalous increase of the received intensity for a few minutes - several hours on a day was identified by the previous 15-day running median and its inter-quartile range. The cross-correlation between the EQ occurrences and the anomalies shows that the appearance of anomalies was significantly enhanced within 5 days before M ≥ 4.8 EQs. The one-day average number of-the anomaly appearance within 5 days was found 2.4 times larger than that of other days. Through the polarization measurement of the received EM waves, the anomalies were found to occur in the atmosphere.

原文	???core.languages.en_GB???
頁（從 - 到）	L17110 1-4
期刊	Geophysical Research Letters
卷	31
發行號	17
DOIs	https://doi.org/10.1029/2004GL019865
出版狀態	已出版 - 16 9月 2004

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10.1029/2004GL019865

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title = "Atmospheric anomalies observed during earthquake occurrences",

abstract = "Appearance of anomalies in the atmosphere before earthquakes (EQs) has been verified, through observation of anomalous transmission of VHF electromagnetic (EM) waves beyond line-of-sight. Anomalous increase of the received intensity for a few minutes - several hours on a day was identified by the previous 15-day running median and its inter-quartile range. The cross-correlation between the EQ occurrences and the anomalies shows that the appearance of anomalies was significantly enhanced within 5 days before M ≥ 4.8 EQs. The one-day average number of-the anomaly appearance within 5 days was found 2.4 times larger than that of other days. Through the polarization measurement of the received EM waves, the anomalies were found to occur in the atmosphere.",

keywords = "6904 Radio science: Atmospheric propagation, 6964 Radio science: Radio wave propagation, 7223 Seismology: Seismic hazard assessment and prediction",

author = "H. Fujiwara and M. Kamogawa and M. Ikeda and Liu, {J. Y.} and H. Sakata and Chen, {Y. I.} and H. Ofuruton and S. Muramatsu and Chuo, {Y. J.} and Ohtsuki, {Y. H.}",

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T1 - Atmospheric anomalies observed during earthquake occurrences

AU - Fujiwara, H.

AU - Kamogawa, M.

AU - Ikeda, M.

AU - Liu, J. Y.

AU - Sakata, H.

AU - Chen, Y. I.

AU - Ofuruton, H.

AU - Muramatsu, S.

AU - Chuo, Y. J.

AU - Ohtsuki, Y. H.

PY - 2004/9/16

Y1 - 2004/9/16

N2 - Appearance of anomalies in the atmosphere before earthquakes (EQs) has been verified, through observation of anomalous transmission of VHF electromagnetic (EM) waves beyond line-of-sight. Anomalous increase of the received intensity for a few minutes - several hours on a day was identified by the previous 15-day running median and its inter-quartile range. The cross-correlation between the EQ occurrences and the anomalies shows that the appearance of anomalies was significantly enhanced within 5 days before M ≥ 4.8 EQs. The one-day average number of-the anomaly appearance within 5 days was found 2.4 times larger than that of other days. Through the polarization measurement of the received EM waves, the anomalies were found to occur in the atmosphere.

AB - Appearance of anomalies in the atmosphere before earthquakes (EQs) has been verified, through observation of anomalous transmission of VHF electromagnetic (EM) waves beyond line-of-sight. Anomalous increase of the received intensity for a few minutes - several hours on a day was identified by the previous 15-day running median and its inter-quartile range. The cross-correlation between the EQ occurrences and the anomalies shows that the appearance of anomalies was significantly enhanced within 5 days before M ≥ 4.8 EQs. The one-day average number of-the anomaly appearance within 5 days was found 2.4 times larger than that of other days. Through the polarization measurement of the received EM waves, the anomalies were found to occur in the atmosphere.

KW - 6904 Radio science: Atmospheric propagation

KW - 6964 Radio science: Radio wave propagation

KW - 7223 Seismology: Seismic hazard assessment and prediction

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DO - 10.1029/2004GL019865

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SP - L17110 1-4

JO - Geophysical Research Letters

JF - Geophysical Research Letters

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Atmospheric anomalies observed during earthquake occurrences

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