Fibre-optic sensing represents a transformative technology for geohazard monitoring. Unlike traditional seismometers, which excel at low-noise, three-component recording, fibre-optic systems offer unparalleled sensor density—enabling continuous, high-resolution measurements along cables spanning kilometres.
Core Technology: DAS & DTSS
The instrument pool will feature two key technologies:
- Distributed Acoustic Sensing (DAS): Measures seismic waves and ground deformation (strain) with metre-scale precision.
- Distributed Temperature and Strain Sensing (DTSS): Monitors subtle temperature and strain changes critical for detecting subsurface fluid movement and deformation.
Acquisition & Application
We will acquire one portable DAS and one portable DTSS interrogator. These units can be connected to existing telecommunication fibres or to purpose-deployed cables included in the pool, creating a versatile system for monitoring near-surface and subsurface processes.
Targets & Users
The monitoring targets align with those of our rapid-deployable seismic sensors, focusing on geohazards like landslides, permafrost thaw, and subsurface instability. The pool will support both long-term research projects and urgent monitoring needs. It builds on existing expertise at NORSAR, NORCE, and UiB, and is available to the wider research and monitoring community.