Skredutsatt utvei ved Holmbuktura sørøst for Tromsø. Foto: Statens vegvesen
Antoine Turquet fra NORSAR holder foredrag om nye systemer for snøskredvarsling (på engelsk):
Modern Real Time Avalanche Monitoring: Distributed Acoustic Sensing for Multi-Site Detection and Environmental Noise Analysis
Snow avalanches pose a significant hazard in mountainous areas, particularly when they block roads, bury vehicles, or expose traffic to successive avalanches during active periods.
Since 2022, we have deployed Distributed Acoustic Sensing (DAS) systems to monitor avalanche activity along multiple road corridors in Western and Northern Norway, covering segments up to 70 km in length. Unlike traditional detection systems, which are limited to a few km segments, the DAS-based alert system works regardless of visibility or adverse weather.
Our algorithm not only detects avalanches reaching the road and estimates the accumulated snow load but also registers high-up avalanches, vehicle movements, and a variety of environmental vibrations—including ocean waves, wind, quarry blasts, and both local and distant earthquakes.
Building on the previously published Holmbuktura avalanche dataset, we extended our analysis to events farther from the road and included an assessment of environmental noise. We also compared data across multiple sites in Norway, different fiber cable installations (directly buried, piped buried etc.), and additional instruments like infrasound stations.
These results highlight the system’s reliability and minimal maintenance needs, offering clear advantages over conventional approaches that are expensive, limited in scope, and sensitive to environmental conditions.
Når/When: 2. oktober kl. 17:00
Hvor/Where: Universitetet i Oslo, Geologibygningen, Auditorium 1, Sem Sælands vei 1, 0371 Oslo