Possible spatial extent of ionospheric GPS-TEC and NmF2 anomalies related to the 1999 Chi-Chi and Chia-Yi earthquakes in Taiwan

Masahide Nishihashi, Katsumi Hattori, Hau Kun Jhuang, Jann Yenq Liu

研究成果: 雜誌貢獻期刊論文同行評審

13 引文 斯高帕斯(Scopus)

摘要

Scientists analyzed temporal variations of local data recorded in Taiwan and reported anomalous reductions in the ionospheric total electron content (TEC) on days 4 and 3 before (17 and 18 September) the Chi-Chi earthquake (Mw 7.6, ML 7.3), and days 3 and 1 prior to (19 and 21 October) the Chia-Yi earthquake (ML 6.4) in Taiwan. In this paper, we propose a spatial analysis which compares the data recorded inside and outside of the earthquake area around Taiwan to discriminate whether the anomalies are local (earthquake related) or global (non-earthquake related) phenomena. Results suggest that the anomalies appearing day 3 before the Chi-Chi earthquake, and days 3 and 1 before the Chia-Yi earthquake are local (earthquake related) phenomena and the anomaly appearing on 17 September 1999 (day 4 before) might be the result of both global phenomena (i.e., a geomagnetic storm) and the local effect of the Chi-Chi earthquake.

原文???core.languages.en_GB???
頁(從 - 到)779-789
頁數11
期刊Terrestrial, Atmospheric and Oceanic Sciences
20
發行號6
DOIs
出版狀態已出版 - 12月 2009

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