Incident report · 2026091801
Ultramar GE: 0.96× baseline latency
Resolved · 2h 1m
What we measured
| Cable | Ultramar GE |
| Segment | Annobon, GQ → Sao Tome, GQ |
| Detected | 2026-09-18 21:31 UTC |
| Resolved | 2026-09-18 23:32 UTC |
| Duration | 2h 1m |
| Observed latency | 60.2 ms |
| Baseline | 62.8 ms · 0.96× |
| Increase | +432% |
| Severity | critical |
Who is affected
Countries where Ultramar GE comes ashore, how much of their submarine diversity this cable represents, and what our probes currently measure into them.
| Country | Dependence on this cable | Other submarine cables | Our probes see |
|---|---|---|---|
| Equatorial Guinea resilience index: 61 · moderate |
1 of 4 cables (25% of submarine diversity) | Africa Coast to Europe (ACE), Ceiba-1, Ceiba-2 | no routes measured into this country |
| São Tomé & Príncipe resilience index: 33 · vulnerable |
1 of 2 cables (50% of submarine diversity) | Africa Coast to Europe (ACE) | no routes measured into this country |
Dependence is structural (share of the country's submarine cables), not a traffic share: real traffic distribution across cables is not public. Terrestrial links are not measured.
Timeline
- Alert 2026091801: critical — ratio 5.32x
- Alert #204 improving: 1/3 consecutive OK
- Alert #204 improving: 2/3 consecutive OK
- Alert #204 resolved: RTT 60.22ms (baseline 62.81ms), 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 2026091801: Ultramar GE. https://geocables.com/incident/2026091801
Embed this map
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