Fibre-optic distributed acoustic sensing data from Reykjanes, Iceland

• Main Authors: Jousset, P., Reinsch, T., Ryberg, T., Blanck, H., Clarke, A., Aghayev, R., Hersir, G., Henninges, J., Weber, M., Krawczyk, C.
• Format: Report
• Language: English
• Published: GFZ Data Services 2018
• Subjects: Reykjanes; Iceland
• Online Access: https://gfzpublic.gfz-potsdam.de/pubman/item/item_3903906

Imaging the internal structure of faults remains challenging using conventional seismometers. Here, the authors use deployed fibre-optic cables to obtain strain data and identify faults and volcanic dykes in Iceland. Such fibre-optic networks are pervasive for telecommu-nication and could be used for hazard assessment. Natural hazard prediction and efficient crustal exploration requires dense seismic observa-tions both in time and space. Seismological techniques provide ground-motion data, whose accuracy depends on sensor characteristics and spatial distribution. In the manuscript Jousset et al. (2018), we demonstrate that strain determination is possible with conventional fibre-optic cables deployed for telecommunication. Extending recently distributed acoustic sensing (DAS) studies, we present high resolution spatially un-aliased broadband strain data. We recorded seismic signals from natural and man-made sources with 4-m spacing along a 15-km-long fibre-optic cable layout on Reykjanes Peninsula, SW Iceland.