Incident report · 2026051502
Baltic Sea Submarine Cable: 1.74× baseline latency
Resolved · 1h 29m
What we measured
| Cable | Baltic Sea Submarine Cable |
| Segment | Helsinki, FI → Stockholm, SE |
| Detected | 2026-05-15 03:01 UTC |
| Resolved | 2026-05-15 04:31 UTC |
| Duration | 1h 29m |
| Observed latency | 78.6 ms |
| Baseline | 45.1 ms · 1.74× |
| Increase | +127% |
| Severity | warning |
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 2026051502: warning — ratio 2.27x
- Alert #120 improving: 1/3 consecutive OK
- Alert #120 resolved: RTT 78.58ms (baseline 45.07ms), 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.
How to cite
GeoCables (2026). Incident 2026051502: Baltic Sea Submarine Cable. https://geocables.com/incident/2026051502
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