Asia Pacific Gateway (APG) cable: latency up to 2.3× normal, 17 Apr 2026
What we measured
| Cable | Asia Pacific Gateway (APG) |
| Segment | Maruyama, JP → Changi South, SG |
| Detected | 2026-04-17 17:02 UTC |
| Resolved | 2026-04-17 18:32 UTC |
| Duration | 1h 30m |
| Observed latency | 75.8 ms |
| Baseline | 110.2 ms · 2.29× |
| Increase | +129% |
| Severity | warning |
Who is affected
Countries where Asia Pacific Gateway (APG) 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 237 ms today vs 161 ms over 30 days (99 routes) - slower |
| Japan resilience index: 100 · resilient |
1 of 53 cables (2% of submarine diversity) | 5 Villages 6 Islands, APCN-2, Apricot +49 more | median 132 ms today vs 202 ms over 30 days (467 routes) - faster |
| Malaysia resilience index: 100 · resilient |
1 of 34 cables (3% of submarine diversity) | APCN-2, Asia Africa Europe-1 (AAE-1), Asia Link Cable (ALC) +30 more | median 218 ms today vs 180 ms over 30 days (47 routes) - slower |
| Singapore resilience index: 78 · resilient |
1 of 46 cables (2% of submarine diversity) | APCN-2, Apricot, Asia Connect Cable-1 (ACC-1) +42 more | median 197 ms today vs 163 ms over 30 days (509 routes) - slower |
| South Korea resilience index: 100 · resilient |
1 of 17 cables (6% of submarine diversity) | APCN-2, Asia United Gateway East (AUG East), E2A +13 more | no measurement today; median 96 ms over 30 days (22 routes) |
| Taiwan resilience index: 100 · resilient |
1 of 21 cables (5% of submarine diversity) | APCN-2, Apricot, Asia United Gateway East (AUG East) +17 more | median 181 ms today vs 152 ms over 30 days (129 routes) - slower |
| Thailand resilience index: 100 · resilient |
1 of 18 cables (6% of submarine diversity) | Asia Africa Europe-1 (AAE-1), Asia Direct Cable (ADC), Asia-America Gateway (AAG) Cable System +14 more | median 216 ms today vs 214 ms over 30 days (157 routes) - unchanged |
| Vietnam resilience index: 81 · resilient |
1 of 9 cables (11% of submarine diversity) | Asia Africa Europe-1 (AAE-1), Asia Direct Cable (ADC), Asia Link Cable (ALC) +5 more | median 233 ms today vs 213 ms over 30 days (92 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. Too few independent vantage points were watching this endpoint to reach a cross-probe verdict.
Timeline
- Alert 2026041706: warning - ratio 2.29x
- Alert #84 improving: 1/3 consecutive OK
- Alert #84 resolved: RTT 75.76ms (baseline 110.18ms), 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.