...
Looking further into data by PingER we can estimate start time for this event . The exact time is bit harder to explain but it is generally between 5 AM and 7 AM GMT on on January 30th Jan 2008 for most of the countries in table 1 with the only exception of Bahrain where it all started at 9AM. The difference might be due to sampling rate or monitoring hosts clock synchronization issue.
PingER calculates throughput of different nodes using Mathew's Formulae