Role of Equatorial Anomaly in Earthquake time precursive features: A few strong events over West Pacific zone

Adaptation of Image Processing technique in identification of earthquake induced anomalous feature from TEC: A new Approach

“…The pixel analysis of global TEC contour indicatesgrowth of EEAthree to four days prior to an impending EQ around the longitude of epicentre followed by its decay and return to the normal condition after the event.Such development of EEA prior to an EQ is alsoreported by many workers [Depueva and Ruzhin 1995;Depueva and Rotanova 2001;Devi et al, 2001Devi et al, , 2004Devi et al, , 2008Devi et al, , 2010Devi et al, ,2013Devi et al, ,2018Shvets 2002;Sorokin et al,2011;Hayakawa 2004;Depueva et al, 2007;Park1971;Balan and Bailey1995] through TEC profile shape, enhancement /decay of equatorial anomaly observed from ground based and satellite remote sensing technique.Thus, image processing approach adopted in this paper in identifying an impending EQ at the longitude sector of the epicentre seems to be an effective tool though one cannot locate the latitudinal coordinate of the epicentre though this technique.Such latitudinal position of the epicentre have been identified by monitoring relevant other parameter like azimuthal status of different satellites coming into field of view of trans receiving line . But to adopt image processing approaches in extraction of information from azimuthal position of the satellite needs special tool for conversion of the same to coded segmentation.…”