TY JOUR TI Natural electromagnetic oscillations in 4–12 Hz frequency range as measured by SWARM satellites and CARISMA magnetometer network KW ionosphere KW geomagnetic pulsations KW MHD waves JO Solnechno-Zemnaya Fizika AU Yagova, N.V. AU Fedorov, E.N. AU Pilipenko, V.A. AU Mazur, N.G. PY 2023 IS 9 PB INFRA-M Academic Publishing LLC.