Smart Cable Routing
Dijkstra-based routing through real submarine cables and landing points from TeleGeography data. Accurate distance multipliers for land and undersea segments.
In-depth analysis of how internet traffic moves through 708 submarine cable systems, based on real measurements from our probes worldwide.
On August 25, 2026, a magnitude 5.5 earthquake occurred 108 km northeast of Hengchun, Taiwan. The event was classified at a green alert level, indicating minimal impact on the surrounding population and infrastructure. While the tremor was felt across nearby regions, its effects were localized, and no significant disruptions were reported. Authorities responded promptly, ensuring safety measures were in place for affected areas.
Submarine cable systems in the vicinity demonstrated strong resilience, maintaining stable operations throughout the event. The Asia United Gateway East (landing at Dawu, Taiwan, 76 km from the epicenter) continued to carry traffic with an average round-trip latency of ~233 ms. Similarly, the TPU cable system (also landing at Dawu) upheld its baseline latency of ~159 ms, while the Southeast Asia-Japan Cable 2 (landing at Fangshan, Taiwan, 101 km from the epicenter) maintained its average latency of ~91 ms. These systems, connecting critical corridors across Asia, performed reliably under monitored conditions.
Real-time monitoring of these cable systems remains active, ensuring continued stability and performance. GeoCables' infrastructure analysis confirms the robustness of these corridors, with consistent checks reinforcing confidence in their operational integrity.
August 25, 2026 - GeoCables experienced a clean and stable day with no anomalies or active alerts across the monitored submarine cable network. Over 1930 latency/route checks were conducted on 650 cables, reflecting a smooth operation without any significant disruptions.
Notable fluctuations in latency were observed for several cables: the Malaysia-Cambodia-Thailand (MCT) Cable saw an increase of 211%, the Jakarta-Bangka-Bintan-Batam-Singapore (B3JS) and JAYABAYA systems each experienced a 66% and 15% rise in latency respectively, while the PIPE Pacific Cable-1 and Jakarta Surabaya Cable System (JAYABAYA) showed improvements with decreases of 19% and 15%. These changes are within typical operational jitter and do not indicate any underlying issues.
Earthquake of magnitude 6 occurred 215 km from Lospalos, Timor-Leste. Submarine cables in the area, including ACC-1 and Hawaiki Nui 1, continue to operate normally.
The same address, 1.1.1.1, answers in 0.69 ms from one city and 11.54 ms from another. We used it as a reachability anchor for three months and measured almost nothing. Traceroutes, numbers, and the fix.
The 6.7 magnitude earthquake near Anízio, Peru, did not affect submarine cables such as Fibra Optica al Pacífico and SAm-1.
Discover why internet data between Brazil and Oman takes an unexpected detour through the US.
An analysis of the undersea cable chokepoint at El Segundo: 13 cables, critical routes, potential threats, and monitoring efforts.
Flooding in Tunisia caused anomalies on submarine cables, including KELTRA-2, HANNIBAL and others. Data analysis and consequences.
A forest fire in Greece on August 17, 2026, led to delays on submarine cables KAFOS and Kardesa, key for internet communication in the region.
Magnitude 6.1 earthquake near Port-Olry, Vanuatu. The Tamtam and ICN1 cables in the epicenter zone continue to operate stabilily.
| Point A | - |
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| Point B | - |
| Coordinates A | - |
| Coordinates B | - |
| Cable Multiplier | - |
| Crosses Ocean | - |
| Route Details | - |
| Data Source | - |
Dijkstra-based routing through real submarine cables and landing points from TeleGeography data. Accurate distance multipliers for land and undersea segments.
Interactive map showing every cable your data touches - backbone nodes, landing stations, and submarine segments with real geographic coordinates.
Launch real network measurements from probes worldwide. Compare theoretical estimates with actual RTT and hop-by-hop packet journeys with ISP geolocation.
Speed-of-light physics combined with cable distance to estimate latency. See the real-world overhead - how much slower actual routing is vs fiber limits.
Enter cities, IP addresses, or domain names - everything is resolved to coordinates with hosting location identification and optimal cable route.
Traceroute hops enriched with city, country, ISP. Phases auto-detected: local → ISP → CDN → backbone → submarine cable. Visual RTT timelines.
City names, IP addresses, or domains. The system resolves coordinates, identifies countries, and determines whether the route crosses oceans.
A graph algorithm finds the optimal route through landing points and submarine cables with accurate distance multipliers for each segment type.
One click launches RIPE Atlas probes for real ping and traceroute. See actual RTT, identify every router, and find where your packet enters submarine cables.
Validate routing assumptions, estimate latency budgets, troubleshoot unexpected paths.
Understand your ping. Compare the physical speed limit vs reality for any server.
Choose optimal PoP locations based on submarine cable topology and landing proximity.
Teach how the physical internet works. Visualize the gap between light speed and real routing.
Over 500 submarine cable systems span the world's oceans, with a combined length of approximately 1.4 million kilometers - enough to circle the Earth 35 times.
Submarine cables carry over 99% of intercontinental data traffic. Despite what many people think, satellites handle only a tiny fraction of global internet traffic.
Light travels through fiber optic cable at about two-thirds the speed of light in vacuum. A signal from London to New York takes approximately 28 milliseconds one way.
Modern submarine cables are designed to last 25 years. Cables are buried in the seabed near shores and laid directly on the ocean floor in deep water, protected by layers of steel and polyethylene.
The deepest submarine cables reach the abyssal plains at nearly 8,000 meters. At these depths, cables rest on the ocean floor under enormous pressure, beyond the reach of anchors and fishing gear.
Major transoceanic cable projects like 2Africa or PEACE cost over $1 billion. Investment comes from tech giants like Google, Meta, and Microsoft, as well as telecom consortiums.
GeoCables is a research publication on the physical infrastructure of the global internet. We publish in-depth analyses of how data actually travels between countries - which submarine cables are used, what the measured latency is, and why it differs from the theoretical minimum.
Our research is grounded in real measurements from our own distributed network of measurement servers. We trace specific routes across 708 submarine cable systems and 1,900+ landing points cataloged by TeleGeography, then publish what we find.
Light through fiber travels at ~200,000 km/s - about two-thirds the speed of light in vacuum. That sets the theoretical floor for round-trip time. In practice, real RTT is 1.5-4× higher due to routing detours, optical amplifiers, protocol processing, peering between networks, and suboptimal path selection. Our research articles document this overhead on specific routes - measuring it, explaining it, and tracing it back to the cables and networks responsible.