摘要：Analysis of cosmic ray neutron intensity observed at Syowa Base in 1961 shows a number of events of unusual decrease in intensity. They are not so-called Forbush decrease but apparent phenomena due to pressure deficiency under a blow of strong wind. It is concluded that this deficiency inside the hut at the base amounts to near the maximum of dynamic pressure, being about 8 millibar against wind velocity of 35m/s.
