8I (2023-2025): EnvSeis project, Kåfjord

• Norwegian University of Science and Technology (NTNU), Norway

This network of sixteen geophones and six broadbands was installed in Kåfjord, Troms og
Finnmark, Norway, to study two rockslides: Njárgavárri and Indre Nordneset. Each study site had
three broadbands from September 2023 to June 2025. In addition, were installed and recording:
September – November 2023: six geophones on each site; April – August 2024: four geophones
at Njárgavárri and ten at Indre Nordneset. The geophones were installed locally around the
rockslides while the broadbands were installed one to a few kilometers from the rockslides
(except for one of them directly at Indre Nordneset). The geophones in Njárgavárri were first
installed as two triangular antennas of four stations each (three in triangle and one in the middle)
and were then replaced by a small aperture array around the most active part of the unstable
slope. The goal was to record all activities: rock falls, cracking and creeping movements. In Indre
Nordneset, the geophone stations were placed in a small aperture array all around the main scarp
and surface of failure to record the cracking activity. The geophones are of type 3-D Geophone
PE-6/B with DATA-CUBE3 (built-in GPS). The broadbands are of type STS-2.5 with EDR-10
digitizers. Sampling frequency was 400 Hz for geophone stations, 200 Hz broadbands. Gain was
at 16 (15.258789 nV/count) for the geophone stations, set on high (100 nV/bit) for the broadband
stations.

FDSN Web Services provide a common data access API for seismic data.

Availability based on irisws-fedcatalog service.
Full fedcatalog information for this network