Figure 2. A pattern of the progress of the storm on Aragats on
24 May. ) The distance to the cloud base. b) Images of the graupel fall.
c) Disturbances of the NS electric field (blue), count rate of ASNT
spectrometer (black), and distance to lightning (red).
On 25 May during a 1-hour long storm, no nearby lightning flashes were
registered at all. TGE was lengthy, its duration was ≈18 minutes and
particle flux continued both during positive and negative NS electric
field, demonstrating that both main scenarios of TGE initiation (with
and without emerging LPCR) can be rather smoothly continued during field
reversal in the lower part of the cloud. Cloud base was higher than that
on 24 May and graupel fall was intense.