With social networking sites you can now find out the news instantly. So Twitter for e.g. lets you find out news straight away as a tweet gets sent in seconds.
Familiarity: is it culturally close to us in Britain?
Because we are researching local newspapers the majority of the news will be about the borough we live in unless there is breaking national news or even sometimes world wide news.
Amplitude Is it a big event? Does it involve many people?
If it is a big event it will most likely be seen and tweeted by people on twitter. There could be a popular hashtag going around which could be on the top 10 trends. Even now on snapchat with snapchat live it allows people to see the big events happening in the world such a big worldwide concerts for e.g.
Frequency: did the event happen fairly quickly?
if it happened on the day. It would be on online and on twitter straight but newspapers would post about it the next day.
Unambiguity: is it clear and definite?
Newspapers have the tendency to not reveal certain stories if they think that they are too difficult to explain, local newspapers may also adopt this same principle.