Network Pulse
Every natural event our monitoring has flagged near a submarine cable - newest first. Each entry shows what happened and whether our latency measurements detected any impact.
M4.8 earthquake · 46 km E of Noda, Japan
A magnitude 4.8 earthquake occurred on June 30, 2026, approximately 46 km east of Noda, Japan.
Our monitoring indicates that the Hokkaido-Sakhalin Cable System (HSCS), which lands at Ishikari, Japan, about 346 km from the epicenter, experienced a latency anomaly. The average latency for this cable was measured at approximately 345 milliseconds over seven days, with ten checks conducted. No active alerts were triggered by this event.
M4.9 earthquake · 234 km SSW of ‘Ohonua, Tonga
On June 29, 2026, a magnitude 4.9 earthquake struck approximately 234 km southwest of ‘Ohonua, Tonga.
No submarine cables with landing points within 350 km of the epicenter are currently monitored by our network. Our latency monitoring has detected two anomalies but no active alerts on the network, indicating that there is no reported impact to the submarine cable systems in this region at present.
M4.6 earthquake · 27 km N of Caraballeda, Venezuela
On June 29, 2026, a M4.6 earthquake struck approximately 27 km north of Caraballeda, Venezuela. Our monitoring currently shows no active alerts but has identified two latency anomalies on the network.
The affected submarine cables within 350km include ALBA-1 (landing at La Guaira), GlobeNet (at Maiquetia), and South American Crossing (SAC) (at Puerto Viejo). Latency measurements indicate that ALBA-1 has an average latency of about 157ms with 26 checks over seven days, GlobeNet shows around 108ms with 11 checks, and SAC measures approximately 98ms with 5 checks. The Amerigo Vespucci and Jerry Newton cables, located further from the epicenter, show no significant latency changes.
M5.3 earthquake · 35 km SSW of Cordova, Alaska
On June 29, 2026, a M5.3 earthquake struck approximately 35 km SSW of Cordova, Alaska. Currently, no submarine cables with landing points within 350km of this epicenter are catalogued in our monitoring system.
Our latency measurements indicate that three anomalies have been detected on the network as a result of this seismic activity. However, it is important to note that we do not have any confirmed reports of active alerts related to specific submarine cables in the affected region at present. The exact impact on the cables remains unknown until further analysis can be conducted.
M5 earthquake · 173 km S of Lembar, Indonesia
On June 29, 2026, a magnitude 5 earthquake occurred approximately 173 km south of Lembar, Indonesia.
The affected region includes the Indonesia Tengah Cable System, which has a landing point at Sanur, Indonesia, located about 202 km from the epicenter. Our latency measurements indicate an average delay of around 144 milliseconds with seven checks over seven days. Currently, there are no active alerts on our network, but we continue to monitor for any potential impacts.
M5 earthquake · 68 km WNW of Catuday, Philippines
On June 28, 2026, a magnitude 5 earthquake struck approximately 68 km WNW of Catuday, Philippines.
The earthquake affected several submarine cable systems with landing points within 350km of the epicenter. Our monitoring indicates latency anomalies on three cables: the Asia-America Gateway (AAG) and SEA-H2X systems, which both land at La Union, Philippines, showing an average latency increase of about 236ms and 170ms respectively over a period of seven days. Additionally, the Asia United Gateway East (AUG East), landing at Luna, Philippines, experienced an increase in latency by approximately 190ms during the same timeframe. The Apricot, PLCN, and EAC-C2C cables, with landings further away from the epicenter, did not show significant changes in their average latencies.
M5 earthquake · 65 km W of Foxton Beach, New Zealand
On June 28, 2026, a magnitude 5 earthquake struck approximately 65 km west of Foxton Beach, New Zealand. Our monitoring currently indicates no active alerts on the network but has identified three latency anomalies.
The Tasman Global Access (TGA) Cable, which lands at Raglan, New Zealand, is within the affected region. Our measurements show an average latency increase of about 29 milliseconds over seven days with seven checks conducted. No other cables in the area are currently showing significant issues as per our monitoring data.
M4.5 earthquake · 20 km W of Boca de Aroa, Venezuela
A magnitude 4.5 earthquake occurred on June 28, 2026, approximately 20 km west of Boca de Aroa, Venezuela.
The submarine cables with landing points within 350km of the earthquake include South American Crossing (SAC), Alonso de Ojeda, Amerigo Vespucci, ARCOS, EC Link, and Jerry Newton. Our latency measurements show that these cables have experienced minor fluctuations; SAC has an average latency increase of about 111ms over seven days, while the other cables ranging from 91ms to 165ms with varying check frequencies indicate similar but slightly different impacts. No active alerts are currently in place, and we continue to monitor the situation closely.
M5.9 earthquake · 50 km ENE of Noda, Japan
On June 27, 2026, a magnitude 5.9 earthquake struck approximately 50 km ENE of Noda, Japan.
The affected submarine cables within our monitoring range are the E2A and the Hokkaido-Sakhalin Cable System (HSCS). The E2A cable, which lands at Tomakomai, Japan, about 272km from the epicenter, showed an average latency increase of approximately 71ms over seven days with 24 checks. Similarly, the HSCS, landing at Ishikari, Japan, 336km from the event, experienced an average latency increase of around 331ms over a week with 10 checks. No active alerts were triggered by this seismic activity.
M5.9 earthquake · 192 km N of Metinaro, Timor Leste
A magnitude 5.9 earthquake occurred on June 27, 2026, approximately 192 km north of Metinaro, Timor Leste. This event is within a range that could potentially impact submarine cables.
Our monitoring indicates latency anomalies in the following cables: Asia Connect Cable-1 (ACC-1), Hawaiki Nui 1, Palapa Ring East, Kupang-Alor Cable Systems, and Indonesia Tengah Cable Systems, all of which have landing points within 350 km of the earthquake. ACC-1 and Hawaiki Nui 1, both landing in Dili, Timor-Leste, showed average latencies of approximately 222ms and 199ms respectively over the past week, with 82 and 78 checks per day. Palapa Ring East, Kupang-Alor Cable Systems, and Indonesia Tengah Cable Systems had measured latencies of around 261ms, 266ms, and 144ms respectively, with fewer daily checks at 51, 3, and 6 respectively over the same period. No active alerts were triggered by this event.
M4.9 earthquake · 13 km SSE of Clam Gulch, Alaska
A magnitude 4.9 earthquake occurred on June 27, 2026, approximately 13 km southeast of Clam Gulch, Alaska.
Our monitoring for this region shows two latency anomalies but no active alerts. There are currently no submarine cables with a landing point within 350 km of the affected area. As we continue to monitor the situation, there is no indication of any cable damage or significant impact on our network at this time.
M5.7 earthquake · 7 km N of Oshino, Japan
A magnitude 5.7 earthquake occurred on June 26, 2026, approximately 7 km north of Oshino, Japan. The seismic activity is within a 350km radius of several submarine cables that we monitor.
Our latency measurements indicate potential impacts on the following cables: FLAG Europe-Asia (FEA), Apricot, I-AM Cable, and Japan-Guam-Australia North (JGA-N). Latency for these cables has shown slight increases, with average measured latencies of ~196ms to ~201ms, based on 7-day checks. Currently, there are no active alerts, but we continue to monitor the situation closely.