Disturbance in Cinia's C-Lion Submarine Cable

Some disturbance has been detected on the C-Lion1 submarine cable between Finland and Germany. 

However, the disturbance does not affect the functionality of telecommunications connections running in the cable and the data traffic continues flowing normally.  The exact cause of the disturbance is still under investigation.

Cinia has submitted a request for investigation to the National Bureau of Investigation (NBI).

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The article has been updated on Monday 24 February at 15:15 (EET)

The damage to Cinia's C-Lion1 submarine cable is suspected to have occurred on Sunday 26 January 2025 at 02:37 (EET). A repair of the cable is currently being planned and the repair schedule will be confirmed at a later date.

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The article has been updated on Tuesday 4 March at 8.35pm (EET)

The damage to the C-Lion1 submarine cable has been confirmed as a shunt fault. The fault has been localized between Gotland and Ventspils, in the same area where damage to the Sweden-Latvia telecommunications cable was detected on January 26, 2025.

The C-Lion1 cable continues to operate normally but requires repair. The repair process has been initiated, and preparations are being made to dispatch a repair vessel to the fault site.

Repair operations are expected to begin during the week starting March 10.

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The article has been updated on Friday 7 March at 10.30am (EET)

The cable repair vessel Cable Vigilance left for the site of the failure on Thursday evening March 6. The current estimate is that the repair of the cable shunt fault will be completed by the beginning of week 12.

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The article has been updated on Monday 10 March at 3:45pm (EET)

Cable repair vessel Cable Vigilance  has arrived at the fault site.

C-Lion1 is a submarine telecommunications cable between Finland and Germany, owned by Cinia, with a length of 1173 kilometers. The submarine cable was commissioned in 2016 and connects Central European telecommunications networks to Finland and the other Nordic countries.

Cinia is a Finnish provider of security for digital environments and a specialist in critical, high reliability connectivity and software. Cinia delivers high-quality network, cybersecurity, and software solutions to both public and private sector customers. For more information: cinia.fi

Media Contacts: 
Cinia Communications
communications@cinia.fi