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

Bankov, 2010, DEMETER and DMSP satellite observations of the disturbed H+/O+ ratio caused by Earth's seismic activity in the Sumatra area during December 2004, Adv. Space Res., 46, 419, 10.1016/j.asr.2009.07.032 Depueva, 1995, Seismoionospheric fountain-effect as analogue of active space experiment, Adv. Space Res., 15, 115, 10.1016/0273-1177(95)00036-E Depueva, 2001, Low-latitude ionospheric disturbances associated with earthquakes, Ann. Geofis., 44, 221 Depueva, 2007, Spatial and time variations in critical frequencies of the ionospheric F region above the zone of equatorial earthquake preparation, Geomagn. Aeron., 47, 129, 10.1134/S0016793207010197 Devi, 2001, Ionospheric electron content near anomaly crest as precursor of earthquake, Indian J. Radio Space Phys., 30, 209 Devi, 2004, Association of total electron content (TEC) and foF2 variations with earthquake events at the anomaly crest region, Ann. Geophys., 47, 83 Devi, M., Barbara, A.K., Ruzhin, Yu.Ya., Depueva, A.H., 2007. Beyond the horizon propagation of VHF signals: atmospheric features and earthquake beyond the horizon propagation of VHF signals, atmospheric features and earthquake. Investigated Russia 129e, 1331–1340. Devi, 2008, Preliminary results of TEC measurements in Guwahati, India, Adv. Space Res., 42, 753, 10.1016/j.asr.2008.01.020 Devi, 2010, Anomalous total electron content (TEC) and atmospheric refractivity prior to the very strong China earthquake of May 2008, Int. J. Rem. Sens., 31, 3589, 10.1080/01431161003727663 Devi, M., Barbara, A.K., Kashyp, P., Depueva, A., Ruzhin, Yu.Ya., Depuev, V., 2011. Earthquake time low latitude TEC and model estimated values: Identification on earthquake induced atmospheric dynamics. In: Satake, Kenji, Duldig, Marc (Eds). Advances in Geosciences. Solar-Terrestrial, vol. 27. World Scientific Publishing Company, Singapore, pp. 69–84. 10.1142/9789814355414_0008. Devi, 2012, Adaptive techniques for extraction of pre-seismic parameters of Total Electron Content (TEC) at anomaly crest station, Geomatics Nat. Hazard. Risk, 3, 193, 10.1080/19475705.2011.595831 Devi, 2012, Total electron content and anomalous appearance of GPS satellites as pointers to epicentre identification of major Japan earthquake of 2011, Positioning, 3, 7, 10.4236/pos.2012.31002 Devi, 2013, Growth and inhibition of equatorial anomaly prior to an earthquake (EQ): case studies with total electron content (TEC) data for major EQs of Japan 2011 and Indonesia 2012, Positioning, 4, 240, 10.4236/pos.2013.43024 Devi, 2014, Earthquake induced dynamics at the ionosphere in presence of magnetic storm, Adv. Space Res., 53, 609, 10.1016/j.asr.2013.11.054 Devi, M., Barbara, A.K., Oyama, K.-I., Ryu, K., Chen, C.-H., Kodama, T., 2015. Expansion of earthquake (EQ) time equatorial anomaly: an index of precursor as seen in major Nepal EQ of April 2015. Int. J. Electron. Appl. Res. 2(2), 46-59. Published Online <http://eses.co.in/ESES> Journal. Hayakawa, 2007, Characteristics of VHF over-horizon signals possibly related to impending earthquakes and a mechanism of seismo-atmospheric perturbations, J. Atmos. Sol.-Terr. Phys., 69, 1057, 10.1016/j.jastp.2007.03.011 Hayakawa, 2010, Current status of seismo-electromagnetics for short-term earthquake prediction, Geomatics Nat. Hazard. Risk, 1, 115, 10.1080/19475705.2010.486933 Le, 2013, The ionospheric anomalies prior to the M9.0 Tohoku-Oki earthquake, J. Asian Earth Sci., 62, 476, 10.1016/j.jseaes.2012.10.034 Li, 2013, Statistical analysis of an ionospheric parameter as a base for earthquake prediction, J. Geophys. Res., 118, 3731, 10.1002/jgra.50313 Liu, 2011, Ionospheric disturbances triggered by the 11 March 2011 M9.0 Tohoku earthquake, J. Geophys. Res., 116, A06319 Oyama, 2016, Modifications of the ionosphere prior to large earthquakes: report from the Ionosphere Precursor Study Group, Geosci. Lett., 3, 6, 10.1186/s40562-016-0038-3 Oyama, K.‑I., Liu, H., Devi, M., Liu, J.Y., Ryu, K., Chen, C.-H., 2016b. Statistical Study on Ionosphere Disturbance before Large Earthquake. Report on Ionospheric Precursor Study Task Group, Mitsubishi Foundation, ID: 26113, pp. 1–104. Ryu, 2016, Precursory enhancement of EIA in the morning sector: contribution from mid-latitude large earthquakes in the north-east Asian region, Adv. Space Res., 57, 268, 10.1016/j.asr.2015.08.030 Xu, 2010, Giant disturbance in the ionospheric F2 region prior to the M8.0 Wenchuan earthquake on 12 May 2008, Ann. Geophys., 28, 1533, 10.5194/angeo-28-1533-2010 Xu, 2011, GPS total electron content and surface latent heat flux variations before the 11 March 2011 M9.0 Sendai earthquake, Adv. Space Res., 48, 1311, 10.1016/j.asr.2011.06.024 Zaslavski, 1998, Analysis of TEC measurements above active seismic regions, Phys. Earth Planet. Inter., 105, 219, 10.1016/S0031-9201(97)00093-9 Zhao, 2008, Is an unusual large enhancement of ionospheric electron density linked with the 2008 great Wenchuan earthquake?, J. Geophys. Res., 113, A11304, 10.1029/2008JA013613