Description:
Whistler triplets, banded whistlers, and temporal fine structure in whistlers observed for the first time in a low latitude ground station at Agra (geomag. lat. 17° 1′ N , L = 1.15) are reported here. We show that the whistler triplets recorded by us are the one hop multipath whistlers which propagated to the ground under the influence of the equatorial anomaly in the dayside of the earth and reached our station in the earth‐ionosphere waveguide mode of propagation. The similar time intervals between the successive triplets are due to similar time intervals between the causative lightning discharges. The banded structure (showing frequency‐ fine structure) and temporal fine structure obseved in groups of high dispersion whistlers are interpreted in terms of the effects of multistroke lightning.