@Article{BagiyaKhSuSuSuRa:2017:OrAhTs,
author = "Bagiya, Mala S. and Kherani, Esfhan Alam and Sunil, P. S. and
Sunil, A. S. and Sunda, S. and Ramesh, D. S.",
affiliation = "{Indian Institute of Geomagnetism (DST)} and {Instituto Nacional
de Pesquisas Espaciais (INPE)} and {Indian Institute of
Geomagnetism (DST)} and {Indian Institute of Geomagnetism (DST)}
and {Space Application Centre (ISRO)} and {Indian Institute of
Geomagnetism (DST)}",
title = "Origin of the ahead of tsunami traveling ionospheric disturbances
during Sumatra tsunami and offshore forecasting",
journal = "Journal of Geophysical Research: Space Physics",
year = "2017",
volume = "122",
number = "7",
pages = "7742--7749",
month = "July",
abstract = "The presence of ionospheric disturbances associated with Sumatra
2004 tsunami that propagated ahead of tsunami itself has
previously been identified. However, their origin remains
unresolved till date. Focusing on their origin mechanism, we
document these ionospheric disturbances referred as Ahead of
tsunami Traveling Ionospheric Disturbances (ATIDs). Using total
electron content (TEC) data from GPS Aided GEO Augmented
Navigation GPS receivers located near the Indian east coast, we
first confirm the ATIDs presence in TEC that appear similar to 90
min ahead of the arrival of tsunami at the Indian east coast. We
propose here a simulation study based on
tsunami-atmospheric-ionospheric coupling that considers
tsunamigenic acoustic gravity waves (AGWs) to excite these
disturbances. We explain the ATIDs generation based on the
dissipation of transverse mode of the primary AGWs. The simulation
corroborates the excitation of ATIDs with characteristics similar
to the observations. Therefore, we offer an alternative
theoretical tool to monitor the offshore ATIDs where observations
are either rare or not available and could be potentially
important for the tsunami early warning.",
doi = "10.1002/2017JA023971",
url = "http://dx.doi.org/10.1002/2017JA023971",
issn = "2169-9402",
language = "en",
targetfile = "bagiya_origin.pdf",
urlaccessdate = "27 abr. 2024"
}