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Solovieva, M., Rozhnoi, A., Fedun, V., Schwingenschuh, K. and Hayakawa, M. 2015. Ionospheric perturbations related to the earthquake in Vrancea area on November 22, 2014, as detected by electromagnetic VLF/LF frequency signals. Annals of Geophysics. 58, 5 (Nov. 2015), A0552. DOI:https://doi.org/10.4401/ag-6827.