On 15 September 2022, at about 06:43 UTC, Ethereum’s execution layer hit the Terminal Total Difficulty the client teams had set (58,750,000,000,000,000,000,000) at block 15,537,393. That was Paris: the last proof-of-work block, then a proof-of-stake block from the Beacon Chain. Bellatrix, on 6 September, had already prepared consensus. The Beacon Chain itself had been running since December 2020. This morning is the join. It is not Shapella (withdrawals, April 2023) and it is not Dencun (blobs, March 2024).
Miners who had been burning electricity to propose blocks stopped doing that job on this chain. Validators who had staked ether took over. Block times settled near twelve seconds. The difficulty bomb was stood down. Users who sent a transaction still paid an auction for inclusion.
What happened
Nothing in your wallet needed a “migration” if you held ether. There was no new ticker. A proof-of-work copycat chain appeared for people who wanted to keep mining; that is a different network with a different security story. If a site asked you to connect a wallet to “claim Merge tokens”, it was a phishing kit with a calendar.
Why it matters
The energy argument changes in scale: the same ledger no longer pays a global fleet of hash. That is real. Fees do not automatically fall because consensus changed — they fall when demand for block space falls, or when later upgrades add a different kind of space for rollups. Staked ether is still locked until withdrawals exist. See ethereum without the jargon. See the later Shapella and Dencun pieces if you are reading this archive in order.
What happens next
A week of uptime screenshots, a leftover mining chain, and a queue of people asking when they can unstake. We will not forecast the print. Nothing here is an instruction to stake, unstake, buy, or sell ether.
