BCS North - Phase 2 cable: latency up to 2.2× normal, 24 Apr 2026
What we measured
| Cable | BCS North - Phase 2 |
| Segment | Helsinki, FI → Logi, RU |
| Detected | 2026-04-24 01:01 UTC |
| Resolved | 2026-04-24 02:31 UTC |
| Duration | 1h 29m |
| Observed latency | 182.2 ms |
| Baseline | 95 ms · 2.22× |
| Increase | +122% |
| Severity | warning |
Who is affected
Countries where BCS North - Phase 2 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 |
|---|---|---|---|
| Finland resilience index: 100 · resilient |
1 of 15 cables (7% of submarine diversity) | Baltic Sea Submarine Cable, BCS North - Phase 1, Botnia +11 more | median 62 ms today vs 48 ms over 30 days (83 routes) - slower |
| Russia resilience index: 100 · resilient |
1 of 13 cables (8% of submarine diversity) | Energy Bridge Cable, Far East Submarine Cable System, Georgia-Russia +9 more | median 59 ms today vs 55 ms over 30 days (1801 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. Other measurements did not confirm the event. We treat this as a probable false positive and label it as such.
Timeline
- Alert 2026042401: warning - ratio 2.22x
- Alert #92 improving: 1/3 consecutive OK
- Alert #92 resolved: RTT 182.16ms (baseline 94.95ms), 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.