
Bitcoin mining activity weakened sharply in January as a severe winter storm across the United States disrupted power supply and forced miners to scale back operations.
Data from Cryptoquant showed a sudden network-wide drop in hashrate, production levels, and miner revenues during the period of extreme weather.
Several large US-based mining firms temporarily curtailed activity as electricity availability became unstable due to storm-related outages.
Cryptoquant estimated the network experienced a hashrate drawdown of roughly 12%, marking the steepest decline since October 2021.
Total hashrate fell to its lowest level since September 2025, reflecting both weather disruption and existing market pressure.
Researchers said the storm intensified an already fragile mining environment shaped by falling prices and high operating costs.
Even before the storm, hashrate had been trending lower as Bitcoin retreated from its $126,000 all-time high towards the $100,000 range.
The price correction tightened margins for miners operating under elevated network difficulty conditions.