TY JOUR TI Isolated substorms according to magnetic measurements at Tixie during minimum solar activity KW substorm KW geomagnetic variations KW fluxgate magnetometer JO Solar-Terrestrial Physics AU Баишев, Д.Г. AU Макаров, Г.А. PY 2023 IS 9 PB Институт солнечно-земной физики СО РАН