Apollo cable: latency up to 3.4× normal, 21 Oct 2026
What we measured
| Cable | Apollo |
| Segment | Manasquan, US → Lannion, FR |
| Detected | 2026-10-21 15:02 UTC |
| Duration | 2d 21h (ongoing) |
| Observed latency | 105.6 ms |
| Baseline | 27.9 ms · 3.36× |
| Increase | +5031% |
| Severity | warning |
Who is affected
Countries where Apollo comes ashore, how much of their submarine diversity this cable represents, and what our measurements into them show.
| Country | Dependence on this cable | Other submarine cables | What the measurements show |
|---|---|---|---|
| France resilience index: 100 · resilient |
1 of 35 cables (3% of submarine diversity) | 2Africa, Africa Coast to Europe (ACE), Africa-1 +31 more | median 67 ms today vs 71 ms over 30 days (666 routes) - unchanged |
| United Kingdom resilience index: 100 · resilient |
1 of 68 cables (1% of submarine diversity) | 2Africa, Amitie, Atlantic Crossing-1 (AC-1) +64 more | median 103 ms today vs 74 ms over 30 days (1011 routes) - slower |
| United States resilience index: 100 · resilient |
1 of 122 cables (1% of submarine diversity) | ACS Alaska-Oregon Network (AKORN), AEC-1, Airraq +118 more | median 116 ms today vs 108 ms over 30 days (3282 routes) - unchanged |
Dependence is structural (share of the country's submarine cables), not a traffic share: real traffic distribution across cables is not public.
Path analysis
Traffic kept the same route. Latency rose without a visible path change, which points at congestion or a fault on the existing route rather than a reroute.
Cross-probe verdict. Our own cross-check concluded this was an operator reroute, not a cable fault. We publish it anyway, labelled as such.
Timeline
- Alert 2026102102: warning - ratio 3.36x
- Alert #236 improving: 2/3 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.