Bitcoin Mining Difficulty Takes a 6% Hit as Post-Halving Hashrate Collapse Accelerates

Bitcoin mining difficulty has experienced its most significant drop in months, falling 6% to 15.14 trillion in the first biweekly adjustment since the third halving on May 11. The decline underscores the mounting pressure on miners navigating a drastically reduced revenue environment, with block rewards halved from 12.5 BTC to 6.25 BTC per block.

TL;DR

• Bitcoin mining difficulty dropped 6% to 15.14 trillion in the first adjustment after the May 11 halving
• Network hashrate plunged over 20%, from approximately 122 EH/s to 97 EH/s
• More than 20 EH/s of computing power — roughly equivalent to 1.5 million older-generation mining machines — was switched off
• Older mining hardware became unprofitable at electricity rates above $0.05 per kWh
• Mining firms with efficient equipment and low energy costs stand to gain market share

The Halving Aftermath: A Hashrate Rollercoaster

The Bitcoin network has been on a rollercoaster ride since the halving event on May 11, which reduced the block reward from 12.5 BTC to 6.25 BTC. The immediate aftermath saw more than 20 exahashes per second of computing power disconnected from the network — the equivalent of roughly 1.5 million older-generation mining machines being powered down.

The seven-day rolling average of Bitcoin’s hashrate plummeted over 20%, falling from approximately 122 EH/s just prior to the halving to around 97 EH/s in the days following. The hashrate decline actually outpaced the mining sprint that preceded the halving, when miners in China rushed to maximize their output before the reward reduction.

“We believe that, as the halving drew closer, miners in China did a sprint run of mining, even with older generation machines, to make most of the last days of the higher block rewards,” explained Kevin Zhang, director of blockchain strategies at Greenidge Generation, a New York-based natural gas power plant that mines Bitcoin.

Difficulty Adjustment Mechanism in Action

Bitcoin’s mining difficulty adjusts itself every 2,016 blocks — roughly every 14 days — to ensure the average block interval remains at approximately 10 minutes. When large numbers of miners disconnect, causing longer block times, the difficulty decreases to encourage participation.

The 6% drop in difficulty is the network’s automatic response to the hashrate exodus. According to profitability data tracked by mining pools PoolIn and F2Pool, older generations of mining equipment became unprofitable at Bitcoin’s price levels with electricity costs exceeding $0.05 per kilowatt-hour. For many operators running Antminer S9 and similar legacy hardware, the halving was the final straw.

Alejandro De La Torre, vice president of mining pool PoolIn, confirmed that miners were aggressively switching on hardware before the halving to maximize rewards, driving “sky-high hash rate figures.” Once the reward reduction kicked in at the midpoint of the difficulty cycle, marginally profitable miners had no choice but to shut down.

Winners Emerge From the Shakeout

The difficulty drop is a silver lining for miners who remain operational. With less competition for the same 900 BTC minted daily, miners with efficient hardware — particularly the newer Bitmain S17 Pro and MicroBT Whatsminer M30 series — and access to cheap electricity are positioned to earn a larger share of block rewards.

Riot Blockchain exemplifies this trend. The Nasdaq-listed mining company announced in early June that it was relocating 4,000 Bitmain S17 Pro miners from Oklahoma City to Coinmint’s facility in Massena, New York. The move is part of a broader strategy to decrease production costs and increase mining uptime through Coinmint’s competitive energy pricing arrangement.

Ashton Soniat, CEO of Coinmint, described the facility as “the largest capacity cryptocurrency mining facility in North America,” designed to serve institutional-grade mining partners. The transition is expected to significantly reduce Riot’s direct cost of BTC production compared to its previous Oklahoma operation.

Looking Ahead: Recovery on the Horizon?

Historical precedent suggests the post-halving hashrate decline is temporary. After the 2016 halving, Bitcoin’s network experienced a similar drop before eventually reaching new all-time highs in both hashrate and price. The difficulty adjustment mechanism is specifically designed to stabilize the network during these transitional periods.

However, the near-term picture remains challenging. Bitcoin’s price experienced violent volatility on June 2, dropping more than $800 in under five minutes from highs above $10,137 to approximately $9,298, further squeezing miner margins. At press time, Bitcoin was trading near $9,500 — a level that keeps pressure on all but the most efficient mining operations.

Why This Matters

The post-halving difficulty adjustment is a textbook demonstration of Bitcoin’s self-correcting economic design. Miners with outdated equipment and high energy costs are being culled from the network, while efficient operators expand their market share. This natural selection process ultimately strengthens the network by ensuring that mining remains in the hands of well-capitalized, technically sophisticated participants. The coming months will reveal whether Bitcoin’s price recovery can outpace the squeeze on miner revenues — and whether the network hashrate will begin its anticipated climb back toward pre-halving levels.

Disclaimer: This article is for informational purposes only and does not constitute financial advice. Always conduct your own research before making investment decisions.