Abstract
A brief review of effects of strong geomagnetic storms on total ozone content, targeted to effects observed near the latitudinal circle of 50N, shows that at these latitudes geomagnetic-storm related changes in total ozone can at least partly be attributed to storm-related changes in atmospheric circulation. Significant effects of geomagnetic storms on total ozone have been observed only in winter and for strong storms, Ap > 40 or better 60, and only under very specific conditions - high solar activity and the east phase of QBO. The observed effects consist in redistribution of ozone, not in ozone production or loss. They are developed best in European sector and invisible in latitudinal average values. No detectable effects of geomagnetic storms on laminae in ozone profiles are found.
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