atmosphere Article Pre-Seismic Irregularities during the 2020 Samos (Greece) Earthquake (M = 6.9) as Investigated from Multi-Parameter Approach by Ground and Space-Based Techniques Sudipta Sasmal 1,*, Swati Chowdhury 1, Subrata Kundu 1, Dimitrios Z. Politis 2 , Stelios M. Potirakis 2,* , Georgios Balasis 3,* , Masashi Hayakawa 4,5 and Sandip K. Chakrabarti 1 1 Indian Centre for Space Physics, 43 Chalantika, Garia St. Rd., Kolkata 700084, India;
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[email protected] (S.K.C.) 2 Department of Electrical and Electronics Engineering, Ancient Olive Grove Campus, University of West Attica, 12244 Egaleo, Greece;
[email protected] 3 Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Metaxa and Vasileos Pavlou, Penteli, 15236 Athens, Greece 4 Hayakawa Institute of Seismo-Electromagnetics Co., Ltd., (Hi-SEM), University of Electro-Communications (UEC), Alliance Center 521, 1-1-1 Kojimacho, Tokyo 182-0026, Japan;
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[email protected] (G.B.) Abstract: We present a comprehensive analysis of pre-seismic anomalies as computed from the Citation: Sasmal, S.; Chowdhury, S.; ground and space-based techniques during the recent Samos earthquake in Greece on 30 October Kundu, S.; Politis, D.Z.; Potirakis, 2020, with a magnitude M = 6.9. We proceed with a multi-parametric approach where pre-seismic S.M.; Balasis, G.; Hayakawa, M.; irregularities are investigated in the stratosphere, ionosphere, and magnetosphere.