The Russian Meteorological Institute (Roshydromet) reported a brief increase in radioactivity on August 82019 in the city of Severodvinsk, northern Russia.
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On 26 April 1986, the explosion and fire at the Chernobyl nuclear reactor in present-day Ukraine resulted in the release of a large amount of radioactive material into the atmosphere.
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The IRSN has published a report detailing the various investigations it has conducted in France and Europe as a result of the measurement of ruthenium 106 in October 2017.
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The French and Finnish radiation protection authorities reported the appearance of minute traces of radioactive iodine-131 (I-131) in air samples in January 2017.
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