TY JOUR TI Clusters of Cyclones and Their Effect on Coast Abrasion in Kaliningrad Region KW cyclone clusters KW storm activity KW storm coast erosion KW level KW autumn–winter season KW Kaliningrad Region KW South-Eastern Baltic Sea KW coastal protection structures JO Russian Journal of Earth Sciences AU Stont, Z.I. AU Esiukova, E.E. AU Ulyanova, M.O. PY 2023 IS 23 PB Geophysical Center of the Russian Academy of Sciences