South American Crossing (SAC) cable: latency up to 2.4× normal, 3 Jul 2026
What we measured
| Cable | South American Crossing (SAC) |
| Segment | Sao Paulo, BR → Las Toninas, AR |
| Detected | 2026-07-03 23:01 UTC |
| Resolved | 2026-07-04 04:31 UTC |
| Duration | 5h 30m |
| Observed latency | 26 ms |
| Baseline | 13.6 ms · 2.39× |
| Increase | +139% |
| Severity | warning |
Who is affected
Countries where South American Crossing (SAC) 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 |
|---|---|---|---|
| Argentina resilience index: 70 · moderate |
1 of 8 cables (13% of submarine diversity) | ARSAT Submarine Fiber Optic Cable, Bicentenario, Firmina +4 more | median 303 ms today vs 211 ms over 30 days (96 routes) - slower |
| Brazil resilience index: 100 · resilient |
1 of 26 cables (4% of submarine diversity) | America Movil Submarine Cable System-1 (AMX-1), Brazilian Festoon, BRUSA +22 more | median 230 ms today vs 154 ms over 30 days (378 routes) - slower |
| Chile resilience index: 100 · resilient |
1 of 10 cables (10% of submarine diversity) | Alisios, Curie, Fibra Optica Austral +6 more | median 9 ms today vs 167 ms over 30 days (94 routes) - faster |
| Colombia resilience index: 100 · resilient |
1 of 12 cables (8% of submarine diversity) | America Movil Submarine Cable System-1 (AMX-1), ARCOS, Carnival Submarine Network-1 (CSN-1) +8 more | no measurement today; median 70 ms over 30 days (42 routes) |
| Panama resilience index: 85 · resilient |
1 of 10 cables (10% of submarine diversity) | Alisios, ARCOS, Carnival Submarine Network-1 (CSN-1) +6 more | no measurement today; median 207 ms over 30 days (18 routes) |
| Peru resilience index: 61 · moderate |
1 of 4 cables (25% of submarine diversity) | Fibra Optica al Pacífico, South America-1 (SAm-1), South Pacific Cable System (SPCS)/Mistral | median 225 ms today vs 229 ms over 30 days (48 routes) - unchanged |
| Venezuela resilience index: 84 · resilient |
1 of 6 cables (17% of submarine diversity) | ALBA-1, ARCOS, Fénix +2 more | average 131 ms over the last day vs 133 ms over 30 days - unchanged |
| U.S. Virgin Islands resilience index: 70 · moderate |
1 of 8 cables (13% of submarine diversity) | Americas-II West, Global Caribbean Network (GCN), Mid-Atlantic Crossing (MAC) +4 more | average 86 ms over the last day vs 99 ms over 30 days - 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 changed route and the original path stopped responding. This is the pattern a real cable break produces.
Cross-probe verdict. Too few independent vantage points were watching this endpoint to reach a cross-probe verdict.
Timeline
- Alert 2026070301: warning - ratio 2.39x
- Alert #142 improving: 1/3 consecutive OK
- Alert #142 improving: 2/3 consecutive OK
- Alert #142 improving: 1/3 consecutive OK
- Alert #142 improving: 1/3 consecutive OK
- Alert #142 improving: 2/3 consecutive OK
- Alert #142 resolved: RTT 25.99ms (baseline 13.59ms), 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.