Network Pulse

A magnitude 5.2 earthquake occurred on June 20, 2026, approximately 10 km south of Kastrí, Greece. This event is within a radius of 350km from several submarine cables that we monitor.

Our latency measurements indicate potential impacts on the following cables: The 2Africa and India Europe Xpress (IEX) cables, both landing at Tympaki, Greece, are showing an average latency increase of about 254ms and 131ms respectively. Similarly, the Asia Africa Europe-1 (AAE-1), Blue, and MedNautilus Submarine System cables, which land in Chania, Greece, have experienced increases averaging around 224ms, 87ms, and 99ms respectively. These measurements suggest that while there are latency anomalies, no active alerts have been triggered as of the current monitoring period.

On June 19, 2026, a M6.6 earthquake occurred approximately 133 km ESE of Petropavlovsk-Kamchatsky, Russia.

No submarine cables with landing points within 350km of the epicenter are currently monitored by our network. Our latency measurements show no anomalies and one active alert on the network as a result of this event. The impact to the submarine cable network in this region is not measured or reported by us, and we have no information indicating any specific damage to cables.

On June 18, 2026, a M5.3 earthquake occurred approximately 63 km southeast of Bobon, Philippines. Our monitoring currently indicates no latency anomalies but has identified one active alert on the network.

The earthquake is within proximity to several submarine cables with landing points in the region. Specifically, the following cables are affected: Apricot (Davao, Philippines), Asia Connect Cable-1 (ACC-1) (Davao, Philippines), Bifrost (Davao, Philippines), and SEA-US (Davao, Philippines). Our latency measurements show average delays of approximately 199ms to 225ms for these cables. Additionally, the Palapa Ring Middle cable (Melonguane, Indonesia) and two domestic networks - PLDT Domestic Fiber Optic Network and Submarine Cable in the Philippines (both landing at Butuan City, Philippines) - are also within a radius of 300km from the event, with average delays around 256ms to 261ms. The Converge Domestic Submarine Cable Network is located further away but still within our monitored range.

On June 18, 2026, a magnitude 4.8 earthquake struck approximately 64 km ESE of Bobon, Philippines. Our monitoring currently indicates no active alerts on the network, but there are 1 latency anomaly observed.

The affected submarine cables within or near the 350km radius include Apricot, Asia Connect Cable-1 (ACC-1), Bifrost, and SEA-US, all landing at Davao, Philippines. Latency measurements for these cables show an average increase of approximately 188 to 226 milliseconds with a check frequency of 32 to 105 per week. Additionally, the Palapa Ring Middle, PLDT Domestic Fiber Optic Network (DFON), Submarine Cable in the Philippines (SCiP), and Converge Domestic Submarine Cable Network (CDSCN) cables, which land at Butuan City and Buenavista, respectively, also exhibit latency increases of around 256 to 261 milliseconds. These measurements are based on our ongoing monitoring over the past week.

On June 17, 2026, a magnitude 4.55 earthquake occurred approximately 17 km southeast of Pāhala, Hawaii.

The Southern Cross Cable Network (SCCN) and Honotua cables are within the affected region, with landing points at Spencer Beach, HI, and Kawaihae, HI, respectively. Our latency measurements indicate that the SCCN experienced an average latency increase of about 206 ms over seven days, while the Honotua cable showed a measured average latency of approximately 177 ms over the same period, with monitoring conducted twice per week.

A magnitude 4.5 earthquake occurred on June 17, 2026, approximately 10 km north-northeast of Luklukan, Philippines.

Our monitoring indicates that several submarine cables are within a 350km radius of the event. Latency anomalies were detected for the Asia Submarine-cable Express (ASE)/Cahaya Malaysia and JUPITER cables, which land at Daet, Philippines, approximately 38km from the epicenter. The ASE/CAHAYA Malaysia cable showed an average latency increase of about 89ms with 7-day checks every day, while JUPITER experienced a higher increase to around 229ms. Other cables in the vicinity, including Converge Domestic Submarine Cable Network (CDSCN), Philippine Domestic Submarine Cable Network (PDSCN), National Digital Transmission Network (NDTN), PLDT Domestic Fiber Optic Network (DFON), APCN-2, and Asia Direct Cable (ADC), which land at Batangas, Philippines, also showed average latency increases ranging from 138ms to 261ms over the same period. No active alerts were triggered by these events.

On June 17, 2026, a M5.1 earthquake struck approximately 25 km southeast of Tambolaka, Indonesia. Our monitoring currently shows no active alerts on our network but reports 1 latency anomaly.

The Palapa Ring East submarine cable, which lands at Waingapu, Indonesia (98km from the epicenter), is within the affected region. Our measurements indicate an average latency of approximately 263ms with 76 checks over seven days. As of now, there are no indications of damage or significant issues affecting this cable.

On June 16, 2026, a magnitude 4.8 earthquake struck approximately 55 km WNW of Poso, Indonesia.

We are monitoring two latency anomalies on our network: Barat Timur Indonesia-2 (BTI-2) and Palapa Ring Middle, both landing at Luwuk, Indonesia, which is about 274 km from the epicenter. Our measurements indicate an average latency of approximately 259 ms for BTI-2 with 9 checks over 7 days, and 256 ms for Palapa Ring Middle with 6 checks over 7 days. At this time, there are no active alerts on our network related to these cables.

A magnitude 5.5 earthquake struck approximately 4 km northwest of Noda, Japan on June 16, 2026. The event is located relatively close to several submarine cable landing points in the region.

• The Japan Information Highway (JIH), which lands at Ibaraki, Japan (56km from the epicenter), and the EAC-C2C, Pacific Crossing-1 (PC-1), FLAG Europe-Asia (FEA), and Tata TGN-Pacific cables, which all land at Ajigaura, Japan (83km from the epicenter), are within 350km of the earthquake. Our latency measurements indicate that these cables may be experiencing minor disruptions; EAC-C2C shows an average latency increase of ~187ms with 29 checks over seven days, while PC-1 has a slight increase to ~133ms with only four checks per week.
• The Hachijojima-Mainland cable, which also lands at Miura, Japan (95km from the epicenter), and the Asia United Gateway East (AUG East), and FLAG North Asia Loop/REACH North Asia Loop cables, both landing at Wada, Japan (106km from the epicenter), are not actively measured but could potentially be affected. As of now, our monitoring does not show any active alerts or significant latency changes for these cables.

No damage has been reported beyond the observed latency anomalies, and we continue to monitor the situation closely.

A magnitude 6.7 earthquake struck on June 16, 2026, approximately 43 km east-southeast of Palu, Indonesia.

Our monitoring indicates that four submarine cables with landing points within a 350km radius of the event are being observed: Barat Timur Indonesia-2 (BTI-2) and Palapa Ring Middle. Latency measurements show an average increase of about 259ms for BTI-2, with seven daily checks over the past week. For Palapa Ring Middle, the latency increased by approximately 257ms, based on three daily checks. The other affected cables - Link 2 Phase-1, JaKa2LaDeMa, Indonesia Tengah Cable Systems, and Luwuk Tutuyan Cable System - are not actively measured at this time.