Measuring Egyptian Internet during the January/Febuary unrest

The graph shows the number of times the DIMES project measured the Egyptian network in a day (specifically we count the number of IP hops in all the traceroutes we performed in day that reside in Egyptian IP space). The disconnection of the Internet in Egypt on January 28th (it was actually disconnected on the evening of January 27th), and well as the reconnection on February 2nd are easily seen in the graph.