Bitcoin's mining difficulty is estimated to decline by approximately 9.55% in roughly eight hours, according to mining network data, following a sustained hashrate drop over the past two weeks. The decline followed bitcoin's brief plunge to as low as $60,000 in early June before rebounding to around $64,000, which pushed hashprice below $30 per petahash per second and renewed pressure on operators with higher costs. The difficulty adjustment mechanism resets the computational work required to mine a block every two weeks, directly affecting mining profitability across the network.
Network Hashrate Falls From 1 ZH/s to 861 EH/s
The network's seven-day moving average hashrate hovered around the 1 zettahash-per-second (ZH/s) mark at the end of May, before falling to roughly 861 EH/s around June 10. It has since recovered moderately to about 894 EH/s in recent days. The decline came after bitcoin briefly plunged to as low as $60,000 in early June, before rebounding to around $64,000.
Bitcoin Price Drop Pushes Hashprice Below $30/PH/s Threshold
The selloff pushed hashprice — a measure of daily mining revenue per unit of hashrate — below $30 per petahash per second, renewing pressure on operators with higher power costs or less efficient fleets. That threshold is important for miners because it pushes more sites closer to, or below, gross breakeven before corporate overhead, debt service and expansion spending. While the most efficient fleets can continue to generate positive margins at lower hashprice levels, older-generation machines and operators with higher electricity costs are more likely to be switched off when revenue falls.
Difficulty Adjustment to Increase Mining Revenue Per Hashrate Unit
The coming difficulty adjustment would reset the amount of computational work required to mine a block lower for the next two-week epoch, lifting the amount of bitcoin that active miners can earn for each unit of hashrate they operate. All else being equal, a 9.55% drop in difficulty increases the amount of bitcoin earned per unit of active hashrate by more than 9%.
Miners Redirect Power Capacity to AI and HPC Workloads
Part of the hashrate drop appears to be economics-driven, while another factor is the continued redeployment of power capacity away from bitcoin mining toward high-performance computing and AI data center workloads. Several public miners have been unplugging mining rigs or slowing mining growth as they retrofit sites for contracted AI/HPC use, a strategy that can remove bitcoin hashrate even when the underlying power capacity remains in use.
Texas 4CP Season Drives Temporary Mining Curtailments
Texas's 4CP season began in June, when large power users in ERCOT try to avoid running during the four summer coincident-peak intervals that determine transmission cost allocation for the following year. For bitcoin miners, the 4CP mechanism creates a strong incentive to curtail during potential monthly peak windows, even when real-time power prices are not especially high. That can temporarily remove significant mining load from the network, particularly because Texas remains one of the largest mining markets in North America. The recent rebound in network hashrate suggests some of the early June reduction may have been a temporary curtailment rather than a permanent shutdown.
FAQ
What is causing Bitcoin's mining difficulty to drop by 9.55%?
The difficulty adjustment follows a sustained hashrate drop over the past two weeks, from around 1 zettahash-per-second at the end of May to roughly 861 EH/s around June 10, with recent recovery to about 894 EH/s.
Why did Bitcoin's hashrate decline in early June?
The hashrate decline came after bitcoin's price briefly plunged to as low as $60,000 in early June, pushing hashprice below $30 per petahash per second and forcing operators with higher costs or less efficient equipment to switch off mining rigs. Additionally, miners have been redeploying power capacity to AI and HPC workloads, and Texas miners curtailed operations during the state's 4CP season that began in June.
How does the difficulty adjustment affect mining profitability?
A 9.55% drop in difficulty increases the amount of bitcoin earned per unit of active hashrate by more than 9%, resetting the computational work required to mine a block lower for the next two-week epoch and lifting mining revenue for active operators.
