Accidents, crimes, and suicides
- The lunar cycle: effects on human and animal behavior and physiology

Lunar periodicity can affect other human activities, as refl ected by traffi c accidents, crimes, suicides, and other behaviors. In one study, daily data on traffi c accidents over a four-year period were compared with daily records of barometric pressure and synodic lunar cycle [1]. No signifi - cant variations in the number of accidents were found in relation to barometric pressure, but an impact of lunar periodicity was observed for one of the years under consideration. The number of accidents occurring during the full-moon day was lowest, the highest occurring two days before the full moon. Accidents were more frequent during the waxing than during the waning phase, but no signifi cant differences were noted when the lunar month was divided into the four intervals of the lunar cycle. The incidence of crimes reported to three police stations in different towns in the period of 1978–1982 was also studied [43]. The incidence of crimes committed on full-moon days was much higher than on all other days, i.e. newmoon days and seven days after the full moon and new moon. The author concluded that the increased percentage of crimes on full-moon days may be due to “human tidal waves” caused by the gravitational pull of the moon. Suicides were also under the infl uence of the lunar cycle [16]. Studies in Ohio (1972–1975) were tabulated by year, month of year, day of week, lunar phase, and holiday occurrence. Only lunar phase demonstrated a signifi cant correlation with suicide rate (p


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