New Cross Pacific (NCP) Cable System: latency up to 2.7× normal, 17 Aug 2026
What we measured
| Cable | New Cross Pacific (NCP) Cable System |
| Segment | Toucheng, TW → Pacific City, US |
| Detected | 2026-08-17 21:02 UTC |
| Resolved | 2026-08-18 00:01 UTC |
| Duration | 2h 59m |
| Observed latency | 181.1 ms |
| Baseline | 172.4 ms · 2.65× |
| Increase | +165% |
| Severity | warning |
Who is affected
Countries where New Cross Pacific (NCP) Cable System 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 |
|---|---|---|---|
| China resilience index: 100 · resilient |
1 of 24 cables (4% of submarine diversity) | APCN-2, Asia Africa Europe-1 (AAE-1), Asia Direct Cable (ADC) +20 more | median 166 ms today vs 148 ms over 30 days (101 routes) - unchanged |
| Japan resilience index: 100 · resilient |
1 of 53 cables (2% of submarine diversity) | 5 Villages 6 Islands, APCN-2, Apricot +49 more | median 209 ms today vs 203 ms over 30 days (436 routes) - unchanged |
| South Korea resilience index: 100 · resilient |
1 of 17 cables (6% of submarine diversity) | APCN-2, Asia Pacific Gateway (APG), Asia United Gateway East (AUG East) +13 more | no measurement today; median 90 ms over 30 days (21 routes) |
| Taiwan resilience index: 100 · resilient |
1 of 21 cables (5% of submarine diversity) | APCN-2, Apricot, Asia Pacific Gateway (APG) +17 more | no measurement today; median 125 ms over 30 days (100 routes) |
| 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 103 ms today vs 108 ms over 30 days (3110 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. Some probes saw the degradation and others did not, which usually means a partial or regional effect.
Timeline
- Alert 2026081702: warning - ratio 2.65x
- Alert #172 resolved: RTT 181.12ms (baseline 172.44ms), 9 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.