(a)

(b)

Lightning Flash Density per 5km x 5km
(a) For all flashes (b) For cloud to ground flashes.

Meteorological conditions and the ratio of cloud to ground flashes
against total flashes.

The ratio of cloud to ground flashes against total flashes
as a function of the altitude for -10C.

The ratio of cloud to ground flashes against total flashes
as a function of SSI.

The histogram of the duration for cloud discharges.