Network Pulse

On July 17, 2026, a magnitude 5.2 earthquake occurred 48 km east of Nishinoomote, Japan. The event was localized in a region with a relatively low population density, and no immediate reports of significant structural damage or disruptions were noted. Authorities and monitoring agencies responded promptly to assess the situation and ensure public safety.

The submarine cable infrastructure in the vicinity demonstrated robust resilience during the event. Key systems such as the Japan Information Highway (JIH), connecting Miyazaki, Japan, to broader networks, maintained consistent performance with an average round-trip time of ~281ms. Similarly, the Korea-Japan Cable Network (KJCN), which links Fukuoka, Japan, to South Korea, sustained its typical latency of ~28ms. These cables, along with others in the region, continued to operate seamlessly, supporting uninterrupted communication and data transfer across critical routes.

Our monitoring systems conducted 1923 latency checks across 701 submarine cable systems in the past 24 hours, ensuring continuous oversight of network performance. Monitoring of these and other vital corridors remains active, providing real-time insights into the health and stability of global submarine cable infrastructure.

On July 16, 2026, Mayon Volcano in the Philippines erupted, emitting ash clouds and producing occasional pyroclastic density currents, incandescent rockfalls, and gas plumes. The eruption, classified with a Volcanic Explosivity Index (VEI) of 4, affected an estimated 5.3 million people within a 100km radius and 1.39 million within 30km. Daily sulfur dioxide emissions ranged from 2,026 to 2,184 tonnes, and seismic activity included numerous rockfalls and volcanic tremors. The aviation alert level remains at Orange, and the event is not expected to require external humanitarian assistance due to the coping capacity of the exposed population.

Submarine cable infrastructure in the region demonstrated resilience during this event. The PLDT Domestic Fiber Optic Network (DFON), landing at Legazpi City just 15km from the volcano, maintained a steady average latency of ~256ms. Similarly, the Philippine Domestic Submarine Cable Network (PDSCN), with a landing point in Bulan 68km away, held its ~254ms average latency. These systems, along with others such as the Asia Submarine-cable Express (ASE), which connects Daet to broader regional networks, carried uninterrupted traffic through the eruption. Monitoring efforts over the past 24 hours included 2050 latency checks across 701 submarine cable systems, ensuring robust oversight.

Real-time monitoring of these corridors continues, ensuring the stability and reliability of critical communication infrastructure in the region. The submarine cable systems remain actively watched as they support uninterrupted connectivity during and beyond the event.

On July 16, 2026, a magnitude 4.7 earthquake occurred 1 km west-northwest of Sōsa, Japan. The event was relatively localized, with its epicenter situated near the eastern coastline of Japan. Despite its proximity to several key infrastructure points, the earthquake's impact appears to have been limited, and regional response systems were able to manage the situation effectively.

The submarine cable systems in the vicinity demonstrated robust resilience throughout the event. For example, the Japan Information Highway (JIH), which lands at Ibaraki (73 km from the epicenter), maintained its average round-trip latency of approximately 281 ms. Similarly, the EAC-C2C system, landing at Ajigaura (74 km away), held steady at around 80 ms, while the Asia Pacific Gateway (APG), landing at Maruyama (94 km away), consistently measured an average of 115 ms. These systems, which connect critical regions across Asia and the Pacific, continued to carry traffic seamlessly during and after the seismic activity.

Monitoring of these and other submarine cable systems remains active in real time, ensuring continuous oversight of network performance and stability across the region. This ongoing vigilance helps to maintain reliable connectivity even in the face of natural events.

On July 15, 2026, a magnitude 4.6 earthquake occurred 47 km east-northeast of Noda, Japan. The event was localized to a relatively small area, with no widespread disruptions reported. Local authorities responded promptly to assess the situation and ensure public safety in the affected region.

The submarine cable infrastructure in the area demonstrated strong resilience during and after the event. Key systems such as the Japan Information Highway (JIH), which connects Akita, Japan, to broader networks, maintained their average latency of approximately 281 milliseconds. Similarly, the E2A cable, landing at Tomakomai, Japan, continued to operate at its usual 78 ms average, while the Hokkaido-Sakhalin Cable System (HSCS), landing at Ishikari, Japan, upheld its typical latency of 373 ms. These systems, which are critical for regional and international connectivity, successfully carried traffic without interruption.

Real-time monitoring of these and other submarine cable systems remains ongoing, ensuring continuous oversight of network performance across the 701 systems under observation. This active monitoring helps maintain confidence in the stability and reliability of global communications infrastructure.

On July 15, 2026, a magnitude 5.1 earthquake occurred 52 kilometers north-northwest of Valparaíso, Chile. The event, centered near a coastal region, was monitored for its potential impact on local infrastructure and populations. Authorities responded promptly, ensuring safety measures were in place for affected areas. Earthquakes of this magnitude can pose risks to critical systems, especially in regions with significant submarine cable activity.

The submarine cable systems landing near Valparaíso demonstrated resilience during the event. Key systems such as the Curie cable (connecting the Americas, with a landing in Valparaíso) and the South Pacific Cable System (SPCS)/Mistral (linking South America and Oceania) maintained their typical performance, with average round-trip latencies of approximately 166ms and 150ms, respectively. The South America-1 (SAm-1) cable, which also connects Valparaíso to broader international networks, held steady at an average of 183ms. These cables, critical to global connectivity, continued to carry traffic seamlessly, underscoring the robustness of the region's undersea infrastructure.

Our monitoring systems remain actively engaged, performing continuous checks across these and other submarine cable systems worldwide. This real-time oversight ensures ongoing reliability and performance across key communication corridors.

On July 14, 2026, a magnitude 6.2 earthquake struck 34 km west-southwest of Sarangani, Philippines. The event occurred in a region with a significant population and infrastructure presence, prompting local response efforts. While the earthquake's effects on land were closely monitored, its proximity to key submarine cable landing points highlighted the importance of robust undersea communication systems in the area.

The submarine cable systems near the event demonstrated remarkable resilience, maintaining stable performance throughout. The Palapa Ring Middle, connecting Indonesia to the region, held an average latency of ~260ms over the past week. Similarly, the Apricot system, landing at Davao, Philippines, maintained its baseline of ~141ms, while the SEA-US cable, also landing at Davao, operated consistently at ~195ms. These systems are vital for regional and international connectivity, and their stability underscores the reliability of the infrastructure even during seismic events.

Monitoring of these and other submarine cable systems continues in real time, ensuring that any potential disruptions are promptly identified and addressed. The network's ability to sustain performance during such events reflects the strength of the infrastructure and the ongoing vigilance of monitoring efforts.

A magnitude 5.2 earthquake occurred on July 14, 2026, approximately 14 kilometers west-southwest of Mabiton, Philippines. The event affected nearby communities and infrastructure within the region, with emergency response teams assessing the situation. While the earthquake's impact was localized, its proximity to critical submarine cable landing points highlights the importance of robust infrastructure in maintaining connectivity during natural events.

The submarine cable systems in the area demonstrated resilience, carrying traffic seamlessly through the event. For example, the Philippine Domestic Submarine Cable Network (PDSCN), which connects Bulan, Philippines, to other domestic locations, maintained its average latency of ~254ms across 15 checks over the past week. Similarly, the Submarine Cable in the Philippines (SCiP), landing at Matnog, Philippines, held steady at ~251ms during the same period. These systems, along with others such as the Asia Submarine-cable Express (ASE) landing at Daet (~128ms avg), continued to perform reliably, ensuring uninterrupted connectivity.

Monitoring of these cable corridors remains active in real time, with 2325 latency checks conducted across 701 submarine cable systems in the last 24 hours. This ongoing vigilance ensures the infrastructure's stability and readiness to support global communications under varying conditions.

On July 14, 2026, a magnitude 4.6 earthquake occurred 6 km northwest of San Rafael, Philippines. While the tremor was moderate in scale, its proximity to populated areas underscores the importance of robust infrastructure in regions prone to seismic activity. Local authorities responded promptly, and no significant disruptions to essential services were reported.

The submarine cable systems near the event demonstrated strong resilience. The Converge Domestic Submarine Cable Network (CDSCN), which connects Pasacao, Philippines, to other domestic hubs, maintained its baseline latency of approximately 257ms. Similarly, the Philippine Domestic Submarine Cable Network (PDSCN), also landing in Pasacao, held steady at around 254ms. The Asia Submarine-cable Express (ASE), linking Daet, Philippines, to international routes, continued to perform reliably with an average latency of 128ms. These systems, along with others in the region, carried traffic seamlessly during and after the event.

Monitoring of these cable corridors remains active and ongoing, ensuring real-time oversight of network performance. The stability observed highlights the robustness of the submarine cable infrastructure in maintaining connectivity under varying conditions.

On July 13, 2026, a magnitude 5.0 earthquake occurred 5 km southeast of Butulan, Philippines. The event was localized, with its epicenter near sparsely populated areas, and did not result in widespread disruption. Regional monitoring and response systems were activated promptly to assess any potential impacts on nearby communities and infrastructure.

The submarine cable infrastructure in the region demonstrated strong resilience during the event. Key systems such as the Apricot cable (connecting Davao, Philippines, to other parts of Asia) and the Asia Connect Cable-1 (ACC-1, also landing at Davao) maintained stable latency averages of ~141ms and ~223ms, respectively. The SEA-US cable, which links Southeast Asia to the United States via Davao, similarly held its baseline performance at ~197ms. These systems, along with others in the vicinity, continued to carry traffic without interruption, underscoring the robustness of the network.

Monitoring of these cable systems remains active, with 2200 latency checks conducted over the past 24 hours across 701 submarine cable systems. Real-time oversight ensures that these critical communication corridors continue to operate reliably, supporting connectivity across the region and beyond.

On July 13, 2026, a magnitude 5.4 earthquake occurred 24 km west of Mabiton, Philippines. The event was categorized at a green alert level, indicating minimal expected impact. While the earthquake was felt in the surrounding areas, no significant disruptions to infrastructure or population centers were reported. Authorities continue to monitor the region for any aftershocks or related developments.

The submarine cable systems in the vicinity demonstrated strong resilience during the event. For example, the Converge Domestic Submarine Cable Network (CDSCN) and the PLDT Domestic Fiber Optic Network (DFON), both landing at Masbate City (78 km from the epicenter), maintained their typical performance levels, with average round-trip times of approximately 257 ms and 256 ms, respectively. Similarly, the Philippine Domestic Submarine Cable Network (PDSCN), landing at Pasacao (85 km from the epicenter), upheld its baseline latency of around 254 ms. These systems, integral to regional and domestic connectivity, continued to carry traffic without interruption.

Real-time monitoring of these and other submarine cable systems remains active, with 2083 latency checks conducted over the past 24 hours to ensure continued stability. The network's performance is under constant observation to safeguard connectivity across all monitored corridors.

On July 12, 2026, a magnitude 5.1 earthquake occurred 27 km south-southeast of Tambolaka, Indonesia. The event was localized near a sparsely populated area, minimizing its direct impact on human settlements. Authorities responded promptly, and monitoring systems tracked the seismic activity to assess potential risks to nearby infrastructure.

The submarine cable systems in the region demonstrated strong resilience during and after the earthquake. The Denpasar-Waingapu Cable Systems, which connect Denpasar and Waingapu, held steady at an average latency of ~224ms over the past week. Similarly, the Mataram Kupang Cable System (MKCS), also landing at Waingapu, maintained an average latency of ~237ms. The Palapa Ring East system, critical for connectivity within eastern Indonesia, consistently operated at ~263ms. These systems continued to carry traffic effectively, underscoring the robustness of the network in the area.

Real-time monitoring of these cable corridors remains active, with 2814 latency checks conducted across 701 submarine cable systems in the last 24 hours. This ongoing vigilance ensures that any changes in network performance are promptly identified and addressed.

A magnitude 4.9 earthquake occurred on July 12, 2026, approximately 241 km NNW of Tobelo, Indonesia. The event affected a sparsely populated area, with no immediate reports of significant impacts on local communities or infrastructure. Authorities responded promptly, monitoring the situation and ensuring readiness for any necessary interventions. The earthquake's duration and intensity were within moderate thresholds, and regional systems demonstrated resilience during the event.

The submarine cable infrastructure in the vicinity maintained stable operations throughout the earthquake. Key systems such as the Palapa Ring Middle (connecting Melonguane, Indonesia, measured ~263ms avg) and the SEA-US cable (linking Kauditan, Indonesia, measured ~200ms avg) continued to carry traffic without interruption. Similarly, the Indonesia Global Gateway (IGG) System, which connects Manado, Indonesia, held its baseline latency of ~97ms avg. These corridors exemplify the robustness of the region's network infrastructure in the face of geological activity.

Monitoring of these cable systems remains active, with 3132 latency checks conducted over the past 24 hours across the submarine network. Real-time oversight ensures that any future developments are swiftly identified and addressed, supporting the continued reliability of global connectivity. GeoCables remains committed to tracking and analyzing network performance with precision.