Large-scale events leave an unquestionable mark on social media. This was true of Hurricane Sandy, for example, and is also true of the widespread protests in Egypt this week. On Wednesday, the Egyptian Military responded to the large-scale demonstrations against President Morsi by removing him from power. Can Twitter provide early warning signals of growing political tension in Egypt and elsewhere? My QCRI colleagues Ingmar Weber & Kiran Garimella and Al-Jazeera colleague Alaa Batayneh have been closely monitoring (PDF) these upheavals via Twitter since January 2013. Specifically, they developed a Political Polarization Index that provides early warning signals for increased social tensions and violence. The analysis & graphs below include the very latest data and I will keep updating this post with new data over the next 24 hours.