TY JOUR TI Waves from the Sun: to the 100th anniversary of V.A. Troitskaya’s birth KW geoelectromagnetic oscillations KW ultra-low frequency KW Alfvén waves KW magnetosphere KW solar wind KW in-terplanetary magnetic field KW helioseismology JO Solar-Terrestrial Physics AU Гульельми, А.В. AU Потапов, А.С. PY 2017 IS 3 PB Институт солнечно-земной физики СО РАН