Please use this identifier to cite or link to this item: http://library.iigm.res.in:8080/xmlui/handle/123456789/1135
Title: Origin of the ahead of tsunami traveling ionospheric disturbances during Sumatra tsunami and offshore forecasting
Authors: Bagiya, Mala S.
Kherani, E.A.
Sunil, P.S.
Sunil, A.S.
Sunda, S.
Ramesh, D.S.
Keywords: Ionospheric disturbances
Tsunami
Traveling ionospheric disturbances
Sumatra tsunami
Tsunami-atmospheric-ionospheric coupling
Issue Date: 2017
Citation: JGR, 122, 7742–7749, doi: 10.1002/2017JA023971
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 ~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.
URI: http://localhost:8080/xmlui/handle/123456789/1135
Appears in Collections:SEG_Reprints

Files in This Item:
File SizeFormat 
JGR, 122, 7742–7749, 2017.pdf1.05 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.