Numbers of first admissions per month for a single psychiatric unit, from 1977 to 1987, were examined for 1829 psychiatric inpatients to assess whether this measure was correlated with 10 parameters of geophysical activity. Four statistically significant values were 0.197 with level of solar radioflux at 2800 MHZ in the corresponding month, −0.274 with sudden magnetic disturbances of the ionosphere, −0.216 with the index of geomagnetic activity, and −0.262 with the number of hours of positive ionization of the ionosphere in the corresponding month. Percentages of variance accounted for were very small.
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