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In another case we compared the performance between SLAC/ESnet or Stanford and PacBell's Internet. In the former case the traffic went via the STARTAP in Chicago and sustained RTT's of around 130 msec. In the latter case it went via Palo Alto and sustained an RTT of about 30 msec.
Evaluating the Impact of:
Major Cable Cuts
When the major cables through the Mediterranean were cut in January and December 2008 the PingER data was used to evaluate which countries were affected, by how much and for how long. See the Effects of Fibre Outage through the Mediterranean and Effects of Mediterranean Fibre Cuts December 2008.
Tsunamis
The earthquake and tsunamis in Japan cause cable cuts which resulted in interruptions in connectivity and increased round trip times caused by re-routing of traffic to avoid fibre optica cables severed off the West costs of Japan
Earthquakes
Earthquakes in Chile caused loss of connectivity, increased jitter and round-trip times.
Social Upheaval
For example for the Arab Spring, the main impact was loss of connectivity die to government shut-downs of Internet access.
Quantifying the Impact of Changes
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