South China Sea: Cable Chokepoint Disruption

Scenario · Cable chokepoints

Topological analysis of the Asia-Europe data transit chokepoints that AI training, inference, and model-distribution traffic depends on; 8 operational + 6 under-construction major submarine cable systems (14 tracked) against TeleGeography routing data, with rerouting latency penalties modeled along alternative paths.

Submarine cable corridors carry the cross-region traffic that AI training runs spanning Asia and Europe depend on, that US labs need to deliver inference to Asian users, that Gulf data centers use to federate with European replicas. Where those corridors narrow to single chokepoints, cable disruption stops being a submarine-cable curiosity and becomes a continuity question for AI compute.

Infrastructure Exposure Analysis

14 cable systems, 8 landing stations, 6 chokepoint zones. Cable-dependency-to-DC mapping with rerouting latency penalty modeling.Submarine cables carry 99% of intercontinental data traffic. When cables through the South China Sea and Suez corridor are disrupted, which data centers lose connectivity, and what rerouting alternatives survive?

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Severity

Submarine cables carry roughly 99% of intercontinental data traffic; 3 chokepoint zones (Bab-el-Mandeb, Malacca, Luzon Strait) concentrate that traffic onto a small number of routes. The Feb–Mar 2024 Red Sea event removed an estimated ~70%of Asia–Europe corridor capacity for weeks while repair was delayed indefinitely in contested waters.

Methodology →TeleGeography Submarine Cable Map · ICPC · ITU · per-cable cloud-region joins (operator-disclosed where available)

Chokepoint AnalysisPer-corridor cable inventory, latency baseline, and which cloud regions lose connectivity when the active scenario fires.6 zones · 14 cables

IncidentsFive categories of historical cable failures (sabotage, anchor-drag, earthquake, volcanic, compound) with attribution evidence.5 historical

Scenario DetailsReference cards for each rerouting scenario — affected cables, capacity loss, latency penalty, alternative-route description.4 scenarios

MethodologyCable route data sourcing (TeleGeography), latency decomposition, capacity-loss caveats, calibration against the 2024 Red Sea event.