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 23, 2026, a magnitude 6.0 earthquake occurred 33 km south-southwest of Honchō, Japan. The event was monitored with a green alert level, indicating limited impact on the surrounding population and infrastructure. Local authorities and monitoring systems responded promptly, ensuring public safety and situational awareness in the affected region.
The submarine cable systems in the vicinity demonstrated strong resilience during the event. The Hokkaido-Sakhalin Cable System (HSCS), which connects Ishikari, Japan, to Sakhalin, maintained its usual average latency of approximately 57 milliseconds. Similarly, the E2A cable, with a landing point in Tomakomai, Japan, continued to carry traffic seamlessly, holding its baseline latency of about 233 milliseconds. These systems, critical for regional and international connectivity, operated without disruption, underscoring their robust design and performance under geophysical stress.
Monitoring of these and other submarine cable corridors remains active, with 1834 latency checks conducted over the past 24 hours across 705 systems. Our systems continue to provide real-time oversight, ensuring the stability and reliability of global communications infrastructure.
The network remained in a clean and stable state today with no anomalies or active alerts recorded across 655 submarine cables during the last 24 hours. Our comprehensive monitoring of 1909 latency/route checks confirmed the continued smooth operation, marking another uneventful day for GeoCables.
Notable fluctuations were observed in several cables: the Coral Sea Cable System (CS²) saw a significant improvement with a 53% reduction in latency to 145.3ms from its 7-day average of 305.9ms, while the Senegal Horn of Africa Regional Express (SHARE) Cable experienced an increase of 67% to 176.7ms from 105.7ms over the same period. Other cables like PIPE Pacific Cable-1 and OTEGLOBE Kokkini-Bari also showed moderate changes, with PPC-1 improving by 31% and OTEGLOBE Kokkini-Bari reducing latency by 52%. These fluctuations are within normal operational ranges and do not indicate any significant incidents or disruptions.
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.
Why do underwater cables converge at Isla Verde? Explore its unique location, main routes, break scenarios, and GeoCables monitoring.
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| Point B | - |
| Coordinates A | - |
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| 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.