  In the present work, occurrence of lightning activity over different
ecological zones of Nepal has been studied. It has been observed that Lower
Tropical zone receives lightning strikes with largest value of density of
strikes whereas the Trans-Himalayan zone receives lightning strikes with least
value of density of strikes. The density of lightning strikes over the Lower
Tropical zone is 0.199 per square km per year whereas, that over the
Trans-Himalayan is 0.02 per square km per year. Other three zones whose values
were observed to be in the higher side were Upper Tropical, Sub-tropical and
Water Body with annual densities of lightning strikes of 0.145 per square km,
0.121 per square km and 0.12 per square km respectively. During a year, 0.026
per square km and 0.022 per square km are densities of lightning strikes for
Alpine and Nival Zones respectively which are close to the lowest value of
Trans-Himalayan zone. Remaining two zones, Sub-alpine and Temperate,
respectively experienced lightning strikes with densities 0.061 per square km
and 0.088 per square km per year.
