Videos

Global Twitter activity


In this video we present the worldwide Twitter activity during an arbitrary week. We plot all geolocated tweets as white dots in the map. It can be noticed that there is a wave of activity from the east to the west side of the globe as days evolve. Also, it is noticeable that the activity decreases to its minimum levels during early mornings.

Global Twitter communication network


In this video we present the global Twitter communication network. Each traveling dot represents a tweet traveling from its source towards its destination. Edges are based on mentions.

Spatio-temporal dynamics of Twitter activity in urban areas


Activity during an average day according to UTC is shown for specified cities. Colors indicate the normalized excess of activity from the average value at that location.

Calls network evolution in Ivory Coast


In this video, we present the dynamical growth of the calls network during a period of 12 hours at an arbitrary day. Dots represent calls, traveling from one antenna to the other at each hour. The edge color is related to the network community where the target node belongs to. It can be noticed that there is an explosion of calls after 6am, showing the dense structure of the network.

Human trajectories network evolution in Ivory Coast.


In this video, we present the dynamical growth of the human trajectories network during an arbitrary day. Dots represent users moving across the country from antenna to antenna. The edge color is related to the network community where the target node belongs to. It can be noticed that the network grows in a sparse way, mostly connecting nodes that are geographically close to each other. Other regions like the capital city (right bottom) concentrate most of the long distance edges.

Floods through mobile phone data
http://www.unglobalpulse.org/tabasco-floods-CDRs


Time-lapse of the Tabasco impact map. The video displays the absolute value of the antenna variation metric from Oct, 2009 to Jan, 2010 as in the temporal series. Each antenna is represented by a circle with color and size proportional to the daily metric value. The segmented flooded area has been colored in light blue. It can be noticed that the antennas near the flooding area dramatically increased their variation during the floods. This effect is noticeable during Christmas and New Years Eve, where all antennas present extremely large variation.

Worldwide Twitter reaction to the announcement of Hugo Ch\’avez decease.


Yellow circles represent a geolocated tweet. The video spans for a 24h period. We show a counter indicating the remaining time before the announcement and the time after it. It can be noticed that at the moment of the announcement the whole world reacted massively to the news by posting related messages.

 

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