Figures shared with CoinDesk show F2Pool, Antpool, BTC.com and Poolin, the four largest pools in the world, have collectively lost 86% of their share of Bitcoin’s global hashrate over the last 24 hours. Primitive Ventures partner Dovey Wan, who operates mining equipment in one of the regions, told CoinDesk the coal-fired plants are down after “a massive explosion under the plants.”