Introduction -- Atmospheric Changes and Observations -- Atmospheric Changes and Observations -- GNSS Ionospheric Sounding -- Detection methods for ionospheric disturbances -- Seismic lower-atmospheric anomalies -- Pre-seismic Ionospheric Anomalies -- Co-/Post-seismic Ionospheric Disturbances -- Two-mode seismo-ionospheric disturbances -- Seismo-ionospheric Rayleigh waves -- Epicenter from Ionos…