Fig. 5From: ULF impulsive magnetic response at mid-latitudes to lightning activityHourly superposed waveforms in the 10-sec vicinity (top panels) and superposed squared waveforms (bottom panels) of detected impulses on Oct. 4, 21–22 LT for H (left-hand panels) and D (right-hand panels) components. NAV is the number of detected pulses during analyzed interval.Back to article page