Simultaneous observations of VLF atmospherics at 10, 20, and 30 kHz recorded in a low-latitude tropical station, Calcutta, on the coast of the Bay of Bengal, exhibit a 'stepped-fall' on the level of atmospherics activity around morning hours. As many as three steps have been observed in some of the cases. The phenomenon has been analyzed in relation to its occurrence, duration, starting time, and magnitude. The seasonal variations and frequency dependence also have been examined. Results reveal that both duration and magnitude of the main step are greater than those for the second and third steps. In general, there are seasonal characteristics. The probable explanation of the phenomenon has been made in terms of the distribution of effective noise sources at such times, mainly at the sea thunderstorms around the observing site.