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Table 2: Daily Ping Losses
The differences between the daily and hourly tables may reflect the sites/countries abilities to switch to alternate routes.
An example of the effect is seen below for a host in Bangalore, India. It can be seen that the RTT went from about 360ms to about 500ms and the losses increased drmatically from close to 0 to 40-60%.
Looking further into data by PingER we can estimate the approximate start time for this event. The exact time is a bit harder to explain but it is generally between 5 AM and 7 AM GMT on January 30th 2008 for most of the countries in table 1 with the only exception of Bahrain where it all started at 9AM. The differences might be due to the measurement sampling rate or monitoring host clock synchronization issues.
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