Sweden-Estonia (EE-S 1): 1.81× baseline latency
What we measured
| Cable | Sweden-Estonia (EE-S 1) |
| Segment | Tallinn, EE → Stavsnas, SE |
| Detected | 2026-05-12 13:01 UTC |
| Resolved | 2026-05-12 14:30 UTC |
| Duration | 1h 29m |
| Observed latency | 76.6 ms |
| Baseline | 42.2 ms · 1.81× |
| Increase | +171% |
| Severity | warning |
Who is affected
Countries where Sweden-Estonia (EE-S 1) 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 |
|---|---|---|---|
| Estonia resilience index: 80 · resilient |
1 of 8 cables (13% of submarine diversity) | Baltic Sea Submarine Cable, E-FINEST, Finland Estonia Connection 1 (FEC-1) +4 more | median 66 ms today vs 65 ms over 30 days (6 routes) - unchanged |
| Sweden resilience index: 100 · resilient |
1 of 29 cables (3% of submarine diversity) | Baltic Sea Submarine Cable, Baltica, BCS East-West Interlink +25 more | median 68 ms today vs 71 ms over 30 days (42 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. Only one probe saw it. We treat this as a probable false positive and label it as such.
Timeline
- Alert 2026051201: warning - ratio 2.71x
- Alert #116 improving: 1/3 consecutive OK
- Alert #116 resolved: RTT 76.58ms (baseline 42.24ms), 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.