The Center for Advanced Spatial Analysis at University College London monitored several cities' Twitter use over a one week period to determine patterns in temporal activities of cities overall and learn about networks within the cities.
From Sustainable Cities Collective:
"Dubai and Istanbul for example are clearly more active in the late hours, where on the other end Cairo and Bogota are early birds and tweet a lot more in the morning. The US cities Boston and Atlanta have both a peak in the morning and in the evening."
This data leads to the question of what significance temporal patterns in social media activity could indicate for overall economic activity in distinct cities or regions.