ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins50% CONFIDENCEOverall confidence: 50%How well the pin's source and references back up its dates.Weighted average of how firmly 1 reference, the source included, supports the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidence
Estimated timeline boundary: Google dates its first Hamina opening to 2011. December 31 is a year boundary, not a verified exact opening day.[1]Operational. Google operates a data centre campus developed at the former Summa paper mill. Its operator timeline separates the 2011 initial opening from later expansions, including a seventh data centre announced in 2024.
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