TY JOUR TI Hysteresis effect between geomagnetic activity indices (Ap, Dst) and interplanetary medium parameters in solar activity cycles 21–24 KW geomagnetic activity KW solar wind KW solar activity cycles KW heliospheric parameters KW hysteresis JO Solar-Terrestrial Physics AU Kurazhkovskaya, N.A. AU Kurazhkovskii, A.Y. PY 2023 IS 9 PB INFRA-M Academic Publishing LLC.