Matrix Cable System: latency up to 2.4× normal, 15 Aug 2026
What we measured
| Cable | Matrix Cable System |
| Segment | Jakarta, ID → Changi South, SG |
| Detected | 2026-08-15 11:01 UTC |
| Resolved | 2026-08-21 21:02 UTC |
| Duration | 6d 10h |
| Observed latency | 13.6 ms |
| Baseline | 20.2 ms · 2.43× |
| Increase | +143% |
| Severity | warning |
Who is affected
Countries where Matrix 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 |
|---|---|---|---|
| Indonesia resilience index: 100 · resilient |
1 of 73 cables (1% of submarine diversity) | Apricot, Asia Connect Cable-1 (ACC-1), Asia United Gateway East (AUG East) +69 more | median 219 ms today vs 199 ms over 30 days (903 routes) - unchanged |
| 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 188 ms today vs 162 ms over 30 days (465 routes) - slower |
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 2026081501: warning - ratio 2.43x
- Alert #169 improving: 1/3 consecutive OK
- Alert #169 improving: 1/3 consecutive OK
- Alert #169 improving: 2/3 consecutive OK
- Alert #169 resolved: RTT 13.64ms (baseline 20.22ms), 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.