Author(s)

J. Hübl, A. Kogelnig, E. Suriñach, I. Vilajosana & B. W. McArdell

Abstract

Debris flows and debris floods are processes that occur in high alpine regions with consequences on infrastructure and settlements. Recently several studies have been conducted by the authors using a new approach to gather knowledge about debris flows using a combination of two acoustic sensors: seismic sensors and infrasound microphones. Both sensors have been individually used in many previous studies. But the potential combination of infrasonic and seismic sensors for monitoring natural hazards, which could take advantage of the benefits of both sensor technologies, has not been evaluated to date. As a consequence, in this study the most important characteristic of acoustic signals from debris flows monitored at different locations in the Austrian and Swiss Alps are summarized and possible interfering signals are presented. Additionally, the data will be compared with other measurements, such as e.g. flow depth, for the interpretation, verification and validation of the seismic and infrasonic data. Keywords: debris flow, monitoring, infrasound, seismic waves. 1 Introduction This study presents a comprehensive summary of debris flows monitoring using a combination of two acoustic sensors: seismometers and infrasound microphones. Both sensors have been individually used previously. Various

Keywords

debris flow, monitoring, infrasound, seismic waves.