Circadian pattern of tweeting activity.

<p>Increasing amount of tweets from midday (12:00) to midnight (00:00) is shown in the yellow shaded regions. Significant decays of the activity are observed during nights. The activity increases during mornings as shown in purple shaded rectangles. In the inset, we show the temporal evolution at a finer scale, where fluctuations are visible. The data exhibit two peaks: The first one is in the evening of a political debate, on May 2 2012 and the second is on the French presidential election day, May 6 2012.