Incident report · 2026040402
GO-1 Mediterranean Cable System: 0.94× baseline latency
Resolved · 3h 17m
What we measured
| Cable | GO-1 Mediterranean Cable System |
| Segment | St. Paul's Bay, MT → Mazara del Vallo, IT |
| Detected | 2026-04-04 06:00 UTC |
| Resolved | 2026-04-04 09:17 UTC |
| Duration | 3h 17m |
| Observed latency | 41.7 ms |
| Baseline | 44.6 ms · 0.94× |
| Increase | +516% |
| Severity | critical |
Who is affected
Countries where GO-1 Mediterranean Cable System 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 |
|---|---|---|---|
| Italy resilience index: 97 · resilient |
1 of 38 cables (3% of submarine diversity) | 2Africa, ANDROMEDA, Asia Africa Europe-1 (AAE-1) +34 more | median 68 ms today vs 72 ms over 30 days (19 routes) - unchanged |
| Malta resilience index: 70 · moderate |
1 of 8 cables (13% of submarine diversity) | Epic Malta-Sicily Cable System (EMSCS), Italy-Malta, Malta-Gozo Cable +4 more | average 69 ms over the last day vs 99 ms over 30 days - faster |
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. Too few independent vantage points were watching this endpoint to reach a cross-probe verdict.
Timeline
- Alert #41: critical - Mazara del Vallo
- Alert #41 improving: 1/3 consecutive OK checks
- Alert #41 improving: 2/3 consecutive OK checks
- Alert #41 resolved: RTT 41.74ms (baseline 44.57ms)
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 2026040402: GO-1 Mediterranean Cable System. https://geocables.com/incident/2026040402
Embed this map
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