TY JOUR TI Synchronous globally observable ultrashort-period pulses KW geomagnetic pulsations KW magnetosphere KW ULF-ELF frequency range KW red sprites KW lightning KW Alfvén resonator JO Solar-Terrestrial Physics AU Marchuk, R.A. AU Potapov, A.S. AU Mishin, V.V. PY 2022 IS 8 PB INFRA-M Academic Publishing LLC.