Asia Connect Cable-1 (ACC-1): latency up to 2.7× normal, 5 Sep 2026
What we measured
| Cable | Asia Connect Cable-1 (ACC-1) |
| Segment | Sydney, AU → Singapore, SG |
| Detected | 2026-09-05 07:31 UTC |
| Resolved | 2026-09-19 18:01 UTC |
| Duration | 14d 10h |
| Observed latency | 168.1 ms |
| Baseline | 117.3 ms · 2.69× |
| Increase | +169% |
| Severity | warning |
Who is affected
Countries where Asia Connect Cable-1 (ACC-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 |
|---|---|---|---|
| Australia resilience index: 100 · resilient |
1 of 34 cables (3% of submarine diversity) | APX East, Australia-Japan Cable (AJC), Australia-Singapore Cable (ASC) +30 more | median 193 ms today vs 254 ms over 30 days (474 routes) - faster |
| Guam resilience index: 83 · resilient |
1 of 19 cables (5% of submarine diversity) | Apricot, Asia-America Gateway (AAG) Cable System, Atisa +15 more | median 297 ms today vs 264 ms over 30 days (59 routes) - unchanged |
| Indonesia resilience index: 100 · resilient |
1 of 73 cables (1% of submarine diversity) | Apricot, Asia United Gateway East (AUG East), Australia-Singapore Cable (ASC) +69 more | median 230 ms today vs 203 ms over 30 days (1061 routes) - unchanged |
| Philippines resilience index: 100 · resilient |
1 of 26 cables (4% of submarine diversity) | APCN-2, Apricot, Asia Direct Cable (ADC) +22 more | median 284 ms today vs 244 ms over 30 days (102 routes) - slower |
| Singapore resilience index: 78 · resilient |
1 of 46 cables (2% of submarine diversity) | APCN-2, Apricot, Asia Direct Cable (ADC) +42 more | median 155 ms today vs 163 ms over 30 days (509 routes) - unchanged |
| Timor-Leste resilience index: 33 · land links |
1 of 2 cables (50% of submarine diversity) | Hawaiki Nui 1 | average 235 ms over 30 days |
| 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 116 ms today vs 108 ms over 30 days (3282 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 2026090507: warning - ratio 2.69x
- Alert #193 improving: 1/3 consecutive OK
- Alert #193 improving: 2/3 consecutive OK
- Alert #193 improving: 2/3 consecutive OK
- Alert #193 improving: 2/3 consecutive OK
- Alert #193 improving: 2/3 consecutive OK
- Alert #193 improving: 1/3 consecutive OK
- Alert #193 resolved: RTT 168.05ms (baseline 117.34ms), 7 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.