“…In this paper, which is an extended version of [28], we present and discuss simultaneous records of current and wideband electric field waveforms at a 380 km distance from the strike point associated with an upward bipolar flash initiated from the Säntis Tower. The flash was recorded on September 21, 2014 and it contained 23 negative strokes and one positive pulse superimposed on the initial-stage current.…”