Pre-Seismic Irregularities during the 2020 Samos (Greece) Earthquake (M = 6.9) as Investigated from Multi-Parameter Approach by Ground and Space-Based Techniques

We present a comprehensive analysis of pre-seismic anomalies as computed from the ground and space-based techniques during recent Samos earthquake in Greece on 30 October 2020, with magnitude M = 6.9. proceed multi-parametric approach where irregularities are investigated stratosphere, ionosphere, magnetosphere. use convenient methods acoustics electromagnetic channels Lithosphere–Atmosphere–Ionosphere-Coupling (LAIC) mechanism by investigating Atmospheric Gravity Wave (AGW), magnetic field, electron density, Total Electron Content (TEC), energetic particle precipitation inner radiation belt. incorporate two ground-based IGS GPS stations DYNG (Greece) IZMI (Turkey) for computing TEC observed significant enhancement daily variation around one week before earthquake. For observation, we multiple parameters recorded Low Earth Orbit (LEO) satellites. AGW, SABER/TIMED satellite data compute potential energy stratospheric AGW using atmospheric temperature profile. It is found that maximum such six days Similar also method wavelet fluctuation values. observe belt over epicenter due to conventional concept an ionospheric-magnetospheric coupling NOAA satellite. first eliminate count rate (CR) possible geomagnetic storms South Atlantic Anomaly (SAA) proper choice field B After removal statistical background CRs, CR four ten mainshock. Swarm outcomes check density profile region preparation. day The studied here show overall anomaly duration