In revenues, Russia's coal supplies to South Korea have increased by $182 million in June.
Meanwhile, in the period from January-June Seoul imported 1.7 times less Russian coal than in the same period last year, or 8.4 million tonnes for $1.1 billion, which was Russia's lowest figure for the first half of the year since 2014.
In June, South Korea mainly imported Russian bituminous coal, purchasing 1.48 million tonnes for $176.2 million. Seoul also imported almost 37,000 tonnes of Russian anthracite for $5.8 million.
Russia remains the third largest coal supplier to South Korea, following Australia with 17.4 million tonnes of coal exported in a half year and Indonesia, with 13.7 million tonnes exported.