What are the next forks of the Blockchain that have been announced? What are the next forks of the Blockchain that have been announced? 
When will they occur? 
Where can you be kept updated?


Many thanks for the replies! 

David
What are the next forks of the Blockchain that have been announced?


Just to be clear, anyone can "announce a fork", but adoption and news of said fork depends on the market demand for the new coin. Most recently, Bitcoin was forked to create Bitcoin Cash (BCH).

Bitcoin SegWit2x (a bitcoin hard fork), Bitcoin gold (a bitcoin hard fork), and Bitcoin ABC (a Bitcoin Cash hard fork) are upcoming hard forks. (note: Bitcoin SegWit2x may or may not result in a currency split, depending on how miner support plays out)


  When will they occur?


Bitcoin SegWit2x at block number 494,784 (no way of knowing exact date) and Bitcoin ABC on November 13th, 2017. Expect many more in the future!


  Where can you be kept updated?


Twitter, reddit, or a google alert with keyword "Bitcoin" :)

Previous Forks:


Bitcoin Cash forked from Bitcoin on Aug 1st, 2017. 
Bitcoin Gold forked from Bitcoin at block number 491,407