[en] 10.12 1988 disturbed period from 14 up to 20 LT (45 deg E time) with two typical substorms, 14.30-15.30 and 18.30-19.30 LT and with magnetic variation between 15.10 and 18.30 LT, stand out at the background of the quiet magnetic field of the first half of Dec 1988
Original Title
Ionosfernye vozmushcheniya 10 dekabrya 1988 g. po nablyudeniyam na Arkhangel'skom poligone