Abstract. The UV radiation and the total ozone content (TOC) during the solar eclipse (96% maximum coverage) were measured by an ultraviolet spectrophotometer. The device measures the direct solar irradiation in the range 300–343 nm at 1 nm spectral resolution. It was calibrated by comparison with the Brewer spectrophotometer. The direct solar irradiance decreased approximately 25–40 times in maximum obscuration of the solar disk. Approximately 15 min after the first contact, the ozone content began to decrease till the maximum phase. 8 min before the maximum obscuration TOC was 14% less than the value of the control day (10th Aug). After the maximum phase the ozone content sharply increased and 35 min later it became 10% more than that on the control day. During the next 50 min TOC reached the normal level.

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