A hard fork is an irreversible blockchain split that occurs when there is a software upgrade that is enforced but is not supported by a segment of the network. (bitcoinafrica.io)
Cryptocurrency proponents also saw the first high profile bitcoin blockchain split in its history. (dailybitcoinnews.com)
More than 96.5 % of the last 144 blocks have signalled support for BIP 91, which optimizes the network for SegWit activation and will help to avoid the bitcoin blockchain split after August 1st. (coinfox.info)