← Back to Sessions

Infrasound Array Analysis of Rapid Mass Movements in Mountain Regions

Description: 

Rapid gravity-driven mass movements (RGMMs), such as rock-falls, snow avalanches, glacier break-off events, debris flows, lahars and pyroclastic density currents are among the most hazardous phenomena occurring in mountain environments. In the last decades remote monitoring solutions for RGMMs have been implemented using acoustic signals radiated by these rapidly moving flows. In particular, infrasound observations, which entail sound below 20 Hz, has been shown to provide a valuable, low-cost, low-latency, and relatively straightforward complement to in situ measurements. Here we present a review of recent infrasound observations comparing various types of RGMMs highlighting the capabilities and limitations of infrasound array monitoring techniques for both research and monitoring applications. We showcase processing strategies for using low-cost infrasound arrays, with apertures of a few tens of meters, to locate and track moving sources and extract information about their source mechanisms using infrasound energetics. This research provides comparative case studies of diverse flow phenomena using infrasound arrays situated several kilometers from respective flow paths.

Session: Detecting, Characterizing and Monitoring Mass Movements - I

Type: Oral

Date: 5/2/2024

Presentation Time: 08:00 AM (local time)

Presenting Author: Jeffrey

Student Presenter: No

Invited Presentation: 

Authors