Bitcoin Mining Difficulty Tanks as Network Adapts to Hash Rate Slump

Bitcoin mining difficulty has experienced a 5.7% decrease, the largest negative adjustment in approximately 18 months. This adjustment, occurring at block height 842,688, brings the difficulty level down to 83.1 trillion. The decline follows a 10% drop in network hash rate, contributing to an all-time low in Bitcoin's hash price, which currently stands at less than $50 per PH/s per day.

Bitcoin Mining Difficulty Declines Sharply, Signaling Network Adjustment Amidst Hash Rate Downturn

On Thursday, the Bitcoin (BTC) network underwent a significant negative adjustment in mining difficulty, marking the largest downward correction in nearly 18 months. Data from Bitbo reveals that the difficulty dropped by 5.7% at block height 842,688, falling to 83.1 trillion. This adjustment represents the most severe negative change since the bear market lows of December 6, 2022, when difficulty fell by 7% while bitcoin traded around $17,000.

Bitcoin's mining difficulty serves as a gauge of the computational effort required to mine a new block. It undergoes automatic adjustments every 2016 blocks, approximately every two weeks, to maintain an average block discovery time of 10 minutes, regardless of the number of miners actively engaged in the process.

An increase in the number of miners typically leads to an increase in mining difficulty, while a decrease in miner participation results in a reduction of difficulty, facilitating block discovery for the remaining miners.

Network Hash Rate Decline Precipitates Difficulty Adjustment

The recent negative difficulty adjustment follows a 10% drop in the network hash rate since the last adjustment on April 24. According to The Block's data dashboard, the seven-day moving average of hash rate has declined from 639.58 exahashes per second (EH/s) to 578.74 EH/s as of Wednesday. Prior to the adjustment, average block times extended to 10 minutes and 36 seconds.

The decline in hash rate led to an all-time low in Bitcoin's hash price, reaching $0.05 per terahash per second per day ($0.05 per TH/s/day) on April 29. This coincided with a drop in bitcoin's price below $63,000. At the time of writing, bitcoin trades around $61,000, as per The Block's price page.

Hash price is a metric coined by Luxor, a Bitcoin mining services firm, representing the expected value of 1 PH/s or 1 TH/s of hashing power per day. It quantifies the potential earnings of a miner based on their hash rate contribution.

Positive Impact on Miner Profitability

Despite the negative adjustment, it could provide some relief for miners who have faced increased challenges since the halving. The adjustment makes it slightly easier to mine blocks compared to the past two weeks.

Difficulty Adjustment History

Today's negative adjustment follows a 1% drop in March and precedes two positive adjustments around the halving event. Bitcoin's fourth halving occurred on April 20, with the penultimate difficulty adjustment pre-halving and the first post-halving adjustment increasing by 4% and 2%, respectively, reaching a record high of 88.1 trillion. This coincided with a hash rate peak of 650.29 EH/s on April 19. The network's hash rate has since fallen by approximately 11%.

The pre-halving adjustment rise reflected increased miner participation in anticipation of the reduction in block subsidy rewards from 6.25 BTC to 3.125 BTC.

The post-halving difficulty adjustment increase, a first of its kind, was attributed to the hype surrounding Runes, a fungible token standard for Bitcoin launched at the halving. Runes initially boosted transaction fee revenue for miners following the subsidy reduction.

Following the halving, block 840,000 generated $2.4 million in fees, far exceeding the $200,000 block subsidy reward. Bitcoin experienced a record 104-block run of transaction fee rewards surpassing the subsidy, as recorded by the Bitcoin explorer Mempool.

The Runes protocol, developed by Ordinals creator Casey Rodarmor, offers a more efficient solution for creating tokens on Bitcoin compared to BRC-20 tokens that utilize Ordinals inscriptions.

Runes transactions generated over $135 million in fees during the first week following their launch. However, following the initial enthusiasm, average transaction fees have dropped significantly from a peak of $128.45 on the day of halving to around $1, according to Mempool data.