South Africa experienced widespread internet connectivity disruptions on August 7, 2024, caused by multiple simultaneous subsea cable failures. According to reports from MyBroadband and monitoring services like NetBlocks, the damage to the WACS, SAT-3, and ACE cable systems significantly reduced international bandwidth capacity, leading to slow speeds and intermittent access for users across the country.
Why did South Africa’s internet go down?
The disruptions stemmed from physical damage to several major undersea fiber-optic cables that connect South Africa to the rest of the world. On August 7, 2024, international transit providers confirmed that the West Africa Cable System (WACS), the South Atlantic 3 (SAT-3) cable, and the Africa Coast to Europe (ACE) system experienced simultaneous outages.
These cables serve as the primary conduits for South Africa’s international internet traffic. When these systems fail, traffic must be rerouted through remaining operational cables, such as the Google-funded Equiano or the Seacom system. This sudden shift in traffic volume creates congestion, which manifests as high latency and slow loading times for end users.
How are service providers responding?
Internet Service Providers (ISPs) and network operators in South Africa, including Vodacom, MTN, and Afrihost, initiated rerouting protocols to mitigate the impact of the cable breaks. According to public statements from these providers, engineers began shifting traffic to alternative routes to maintain connectivity.
While rerouting helps restore access, it does not provide the same total capacity as the primary infrastructure. Consequently, users reported that while services were functional, the quality of high-bandwidth activities—such as video streaming, cloud computing, and international gaming—remained degraded until repairs could be finalized.
What is the timeline for repairs?
Repairing subsea cables is a complex, multi-week process that requires specialized vessels to locate the break point on the ocean floor and splice the fiber optic lines. Unlike terrestrial cable repairs, which can often be addressed within hours, subsea operations are subject to maritime conditions and the availability of repair ships stationed in the region.
Historically, subsea cable repairs follow a standard procedure:
- Detection: Operators identify the specific geographic location of the fault.
- Mobilization: A cable repair ship is dispatched to the coordinates.
- Retrieval: The damaged section of the cable is hoisted to the surface.
- Splicing: Technicians join the fiber strands and re-seal the cable casing.
- Testing: The line is verified for data integrity before being brought back online.
Comparison of Connectivity Impact
The August 2024 outage highlights the vulnerability of South Africa’s digital infrastructure. The following table illustrates the difference between standard operations and the state of the network during the incident:
| Feature | Normal Operations | During Cable Outage |
|---|---|---|
| Bandwidth Capacity | Full redundancy across all cables | Reduced; dependent on remaining lines |
| Latency | Low (direct routing) | High (due to congestion on alternative paths) |
| User Experience | Stable, high-speed access | Intermittent, slow, or "timed out" connections |
Looking Ahead
The frequent nature of these outages has prompted discussions regarding the necessity of further diversifying South Africa’s international connectivity. While new cables like Equiano have added significant capacity, the reliance on a limited number of subsea landing stations remains a structural risk. Future stability depends on both the rapid repair of the current damaged systems and the ongoing expansion of diverse, redundant landing points along the African coastline.