Incident report · 2026082301
UK-Channel Islands-8: 0.18× baseline latency
Resolved · 2h 0m
What we measured
| Cable | UK-Channel Islands-8 |
| Segment | Goonhilly Downs, GB → St. Ouens Bay, JE |
| Detected | 2026-08-23 22:31 UTC |
| Resolved | 2026-08-24 00:32 UTC |
| Duration | 2h 0m |
| Observed latency | 7.1 ms |
| Baseline | 39.7 ms · 0.18× |
| Increase | +279% |
| Severity | warning |
Who is affected
Countries where UK-Channel Islands-8 comes ashore, how much of their submarine diversity this cable represents, and what our measurements into them show.
| Country | Dependence on this cable | Other submarine cables | What the measurements show |
|---|---|---|---|
| Jersey resilience index: 42 · vulnerable |
1 of 3 cables (33% of submarine diversity) | Guernsey-Jersey-4, INGRID | average 11 ms over the last day vs 27 ms over 30 days - faster |
| United Kingdom resilience index: 97 · resilient |
1 of 67 cables (1% of submarine diversity) | 2Africa, Amitie, Apollo +63 more | median 82 ms today vs 69 ms over 30 days (102 routes) - slower |
Dependence is structural (share of the country's submarine cables), not a traffic share: real traffic distribution across cables is not public.
Timeline
- Alert 2026082301: warning - ratio 3.79x
- Alert #176 improving: 1/3 consecutive OK
- Alert #176 improving: 2/3 consecutive OK
- Alert #176 resolved: RTT 7.1ms (baseline 39.73ms), 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 2026082301: UK-Channel Islands-8. https://geocables.com/incident/2026082301
Embed this map
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