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 interplanetary magnetic field KW helioseismology JO Solnechno-Zemnaya Fizika AU Guglielmi, A.V. AU Potapov, A.S. PY 2017 IS 3 PB INFRA-M Academic Publishing LLC.