Google News Updates Algorithm: Sourcing Story Updates & Local Context To News:
The Google News Blog announced they have updated their algorithms to become more relevant and fresh with news.
The first update Google told us about is that they are not offering news from the original source, but now they will update the news cluster to show updated information from a new source that adds updated or new information to that story. The second update is that Google will try to find the local source of the story and place that as the top story in the cluster.
From Internet Marketing and Online Annonsering