Incident report · 2026040801
Southern Caribbean Fiber cable: latency anomaly, 8 Apr 2026
Resolved · 6h 59m
What we measured
| Cable | Southern Caribbean Fiber |
| Segment | Chaguaramas, TT → San Juan, US |
| Detected | 2026-04-08 02:32 UTC |
| Resolved | 2026-04-08 09:31 UTC |
| Duration | 6h 59m |
| Observed latency | 44.8 ms |
| Baseline | 59.1 ms · 0.76× |
| Increase | +275% |
| Severity | critical |
Who is affected
Countries where Southern Caribbean Fiber comes ashore, how much of their submarine diversity this cable represents, and what our measurements into them show.
Dependence is structural (share of the country's submarine cables), not a traffic share: real traffic distribution across cables is not public.
Path analysis
No usable traceroute data for this window.
Cross-probe verdict. The effect was confined to a narrow set of paths, so a cable-wide fault is unlikely.
Timeline
- Alert #64: critical (backfilled)
- Alert #64 improving: 1/3 consecutive OK checks
- Alert #64 improving: 2/3 consecutive OK checks
- Alert #64 resolved: RTT 44.81ms (baseline 59.07ms)
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 2026040801: Southern Caribbean Fiber. https://geocables.com/incident/2026040801
Embed this map
<iframe src="https://geocables.com/embed.php?type=map&id=southern-caribbean-fiber" width="640" height="420" frameborder="0" loading="lazy" style="border:0;border-radius:10px"></iframe>