TY JOUR TI Offsets in the geomagnetic indices of the magnetospheric ring current KW geomagnetic index Dst KW geomagnetic indices SYM and ASY KW magnetospheric ring current JO Solar-Terrestrial Physics AU Макаров, Г.А. PY 2021 IS 7 PB Институт солнечно-земной физики СО РАН