Recently I have read about a nuclear explosion which occurred on 9th August in 2019 in Nyonoksa. Nyonoksa is a village under the administration jurisdiction of Russian Federation. In 2017 and 2018, the nuclear powered cruise missile was checked without any failure but later it was proved that it was a failed test under the isotope power source for a liquid fuelled rocket engine. The explosion took place at the infrasound station in the Troms, Norway