  A recent study pointed out that macroscopic dark matter (macros) traversing
through the earth's atmosphere can give rise to hot and ionized channels
similar to those associated with lightning leaders. The authors of the study
investigated the possibility that when such channels created by macros pass
through a thundercloud, lightning leaders may locked into these ionized
channels creating lightning discharges with perfectly straight channels. They
suggested the possibility of detecting such channels as a means of detecting
the passage of macros through the atmosphere. In this paper, we show that
macros crossing the atmosphere under fair weather conditions could also give
rise to mini lightning flashes with current amplitudes in the order of few
hundreds of Amperes. These mini lightning flashes would generate a thunder
signature similar to or stronger than those of long laboratory sparks and they
could also be detected by optical means. As in the case of thunderstorm
assisted macro lightning, these mini-lightning flashes are also associated with
straight channels. Moreover, since the frequency of mini lightning flashes are
about three hundred times more frequent than the macro generated lightning
flashes which were assisted by thunderstorms, they could be used as a means to
look for the paths of macroscopic dark matter crossing the atmosphere.
