International Federation of Digital Seismograph Networks

4J (2025-2025): UNDERCOVER large-N Array Finland

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FDSN Network Information

FDSN code 4J (2025-2025) Network name UNDERCOVER large-N Array Finland
Start year 2025 Operated by
End year 2025 Deployment region -
Description

This seismic network consisted of 493 geophone stations, with Geospace GS-One 5 Hz geophone sensors and Geospace GSB dataloggers, that recorded at 250 Hz from early June to early August 2025. There was an exchange of dataloggers and some re-deployment of stations at mid-term. The stations were deployed in northeastern Finland, close to the town of Ruka, in the framework of the Horizon Project UNDERCOVER, in an area of about 30x25 km. Together with a larger-scale broadband deployment that was carried out at the same time, the data were collected to illuminate the crustal structure of a major Paleoproterozoic shear zone, the Kuusamo Schist Belt.

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