%0 Journal Article %T Microwave indicator of potential geoeffectiveness and magnetic flux-rope structure of a solar active region %A Kudriavtseva, A.V. %A Myshyakov, I.I. %A Uralov, A.M. %A Grechnev, V.V. %K solar active regions, magnetic fields, microwave emission, solar flare forecast %J Solnechno-Zemnaya Fizika %D 2021 %N 7 %P 9 %I INFRA-M Academic Publishing LLC.