claim: Earth's atmosphere experiences an acoustic effect during a thunderstorm.
evidence: Belogorsky District is an administrative and municipal district -LRB- raion -RRB- , one of the twenty in Amur Oblast , Russia .. Amur Oblast. Amur Oblast. raion. raion. twenty. administrative divisions of Amur Oblast. Russia. Russia. The area of the district is 2591 km2 .. Its administrative center is the town of Belogorsk -LRB- which is not administratively a part of the district -RRB- .. town. types of inhabited localities in Russia. Belogorsk. Belogorsk, Amur Oblast. administrative center. administrative center. Population  : 23,848 -LRB- 2002 Census -RRB- ;. 2002 Census. Russian Census ( 2002 )