When Is A Blogstorm A Blogstorm?

There is a new word in the lexicon and it is blogstorm.

n. When a large amount of activity, information and opinion erupts around a particular subject or controversy in the blogosphere, it is commonly called a blogstorm or blog swarm.

It does not yet have its own definition on Wikipedia, but instead is defined as part of the Weblog entry.

So, when is large, large? Are we going to have ratings for blogstorms like we do for earthquakes, tornadoes, or hurricanes? How do we denote local storms from regional, national, and world-wide tempests? Are we going to see the emmergence of a monitoring agency, like NOAA to track blogstorms and give them official names? Inquiring minds want to know.