umarkalim writes: Despite the devastating earthquake, Internet connectivity to Japan was maintained. The PingER project which monitors interregional connectivity in terms of Latencies, Losses, Throughput and Reachability metrics allowed researchers to conclude that Internet connectivity to Japan was maintained. Round Trip Times (RTT) to some hosts increased significantly as seen from SLAC, USA. However as seen from RIKEN in Japan they did not increase. It appears the increase in RTT depends on the route from the monitoring host to Japan. This suggests a possible cable disruption. For more on cables see here.