Japan experienced a brief but significant degradation in internet connectivity in the early hours of August 23. The disruption began at 01:20 UTC and lasted approximately 30 minutes, with a severity score of 692 recorded for the affected network signal.
Technical Details
The primary affected metric was the ping-slash24 signal, which measures ICMP reachability across IPv4 network prefixes. The signal recorded a drop of 29% from its peak value during the observation window. Other network health indicators, including BGP control plane visibility and backscatter traffic measurements, showed minimal deviation from normal baselines.
The cause has not been publicly attributed. The disruption was resolved by 01:50 UTC.
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