Sierra Leone Experiences Internet Connectivity Degradation
Sierra Leone experienced a significant internet connectivity disruption on Thursday, May 28, 2026. The degradation occurred in two distinct phases between 06:23 and 12:23 UTC, with a total severity score of 2,679. The primary impact was observed on the ping-slash24 signal, which measures ICMP reachability across IPv4 network prefixes.
Technical Details
The disruption consisted of two separate periods. The first lasted from approximately 09:10 to 10:30 UTC, registering a severity score of 1,714. A second, shorter period followed from 11:50 to 12:20 UTC, with a score of 964. The event lasted a total of 3.2 hours.
Active probing across IPv4 /24 prefixes showed reduced reachability, with a drop magnitude of -48% from the peak. The Border Gateway Protocol (BGP) control plane, which governs routing visibility, remained stable throughout the event. The gtr.sarima signal, which forecasts deviations from expected traffic baselines, recorded a -60% drop. The ucsd-nt signal, a backscatter measurement used as a proxy for aggregate connectivity, showed a complete -100% drop from its peak.
The cause has not been publicly attributed. Connectivity was reported restored by 12:23 UTC.
