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Consensus

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Consensus widget — missed slots, finality and recent reorgs

What it shows

The health of Ethereum's consensus layer in three numbers, next to Top Block Builders:

  • Missed slots 24h — slots of the last 24 hours in which no block was proposed, out of all slots of that period. A slot is counted once it is final, so the count trails the head a little. The number links to the full list on Validators.
  • Finality — how many slots lie between the chain head and the last finalized checkpoint, and the same distance in epochs.
  • Reorgs 24h — reorganizations of the chain head seen in the last 24 hours.

Below them, Recent reorgs lists the latest five with their slot, depth and age. Each one links to its execution block once the slot is final; before that the row says block not final yet.

How to read it

  • Missed slots are normal in small numbers. A few dozen of roughly 7,200 daily slots go empty on an ordinary day — a validator was offline or late. A sharp rise across many validators points at a client bug or a network problem rather than at one operator.
  • Finality of about two epochs is the healthy state. Ethereum finalizes a checkpoint roughly every two epochs (~13 minutes). A finality lag that keeps growing means the network is not reaching the vote it needs, and it deserves attention.
  • A reorg of depth 1 is routine. The head block was replaced by a competing one, usually because it arrived late. Deeper reorgs are rare.
  • Honest gaps. When no new head has been observed for a while, the widget says so above the numbers. When the reorg listener was down for part of the day, the count reads ≥ N, because a reorg in that gap would not have been counted.

Data & update cadence

Covers the last 24 hours and refreshes about once a minute, and immediately when a reorg is observed. If a refresh fails, the widget keeps the previous reading for one more minute and says so.

  • Validators — missed slots per epoch, the assigned validators and their pages
  • Top Block Builders — who built the blocks that were proposed
  • Block KPIs — the latest block on the execution side

Last updated 22 Oct 2026, 08:06 UTC · verified against TraceFast v1.0.261 · Markdown