We analyzed 48 years of the data from the Nagoya muon telescope
without using the East minus West method.
The results confirm the existence of
(1) one-year periodic oscillations, and
(2) winter (4~10) day variations.
(3) A new (125+-45) day cycle was also confirmed.
Data analysis of the upper atmosphere revealed
that (1) and (2) were caused by altitude variations
in the upper atmosphere. While, as for (3),
it was found that it appears during the active period of solar activity. Quite surprisingly, the 125 day activity appeared also
in the lowest time of solar activity.
However the rate of occurrence has decreased with the decline
in solar activity since 1992.