Incident report · 2026051101
Sirius South: 0.56× baseline latency
Resolved · 1h 30m
What we measured
| Cable | Sirius South |
| Segment | Blackpool, GB → Dublin, IE |
| Detected | 2026-05-11 17:01 UTC |
| Resolved | 2026-05-11 18:31 UTC |
| Duration | 1h 30m |
| Observed latency | 21.4 ms |
| Baseline | 38.2 ms · 0.56× |
| Increase | +138% |
| Severity | warning |
Path analysis
Traffic kept the same route. Latency rose without a visible path change, which points at congestion or a fault on the existing route rather than a reroute.
Cross-probe verdict. Only one probe saw it. We treat this as a probable false positive and label it as such.
Timeline
- Alert 2026051101: warning — ratio 2.3x
- Alert #115 improving: 1/3 consecutive OK
- Alert #115 resolved: RTT 21.44ms (baseline 38.17ms), 3 consecutive OK
Detection method
Latency is sampled continuously from our probe network. An alert opens when round-trip time to a monitored endpoint holds above its rolling baseline, and closes automatically once it returns. Full method is described on the methodology page.
How to cite
GeoCables (2026). Incident 2026051101: Sirius South. https://geocables.com/incident/2026051101
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