TY - JOUR
T1 - Seismo-ionospheric signatures prior to M ≥ 6.0 Taiwan earthquakes
AU - Liu, J. Y.
AU - Chen, Y. I.
AU - Pulinets, S. A.
AU - Tsai, Y. B.
AU - Chuo, Y. J.
PY - 2000
Y1 - 2000
N2 - This paper examines variations of the greatest plasma frequency in the ionosphere, foF2, recorded by the Chung-Li ionosonde (25.0°N, 121.1°E) before M≥6.0 earthquakes during 1994-1999. The 15-day running median and the associated inter-quartile range are utilized as the reference and the upper or lower bounds to monitor the ionospheric foF2 variations for finding seismo-ionospheric signatures (precursors) of the earthquakes. It is found that precursors, in the form of the recorded foF2 falling below its associated lower bound around 1200-1700 LT, appear 1-6 days prior to these earthquakes. On September 20, 1999 UT (September 21, Taiwan local time) a large Mw=7.7 earthquake struck central Taiwan near the small town of Chi-Chi. We analyzed the foF2 and found three clear precursors 1, 3, and 4 days prior to the Chi-Chi earthquake.
AB - This paper examines variations of the greatest plasma frequency in the ionosphere, foF2, recorded by the Chung-Li ionosonde (25.0°N, 121.1°E) before M≥6.0 earthquakes during 1994-1999. The 15-day running median and the associated inter-quartile range are utilized as the reference and the upper or lower bounds to monitor the ionospheric foF2 variations for finding seismo-ionospheric signatures (precursors) of the earthquakes. It is found that precursors, in the form of the recorded foF2 falling below its associated lower bound around 1200-1700 LT, appear 1-6 days prior to these earthquakes. On September 20, 1999 UT (September 21, Taiwan local time) a large Mw=7.7 earthquake struck central Taiwan near the small town of Chi-Chi. We analyzed the foF2 and found three clear precursors 1, 3, and 4 days prior to the Chi-Chi earthquake.
UR - http://www.scopus.com/inward/record.url?scp=0033625917&partnerID=8YFLogxK
U2 - 10.1029/2000GL011395
DO - 10.1029/2000GL011395
M3 - 期刊論文
AN - SCOPUS:0033625917
SN - 0094-8276
VL - 27
SP - 3113
EP - 3116
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 19
ER -