Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/14324
Authors: De Angelis, Silvio* 
Haney, Matthew M* 
Lyons, John J* 
Wech, Aaron* 
Fee, David* 
Díaz-Moreno, Alejandro* 
Zuccarello, Luciano* 
Title: Uncertainty in Detection of Volcanic Activity Using Infrasound Arrays: Examples From Mt. Etna, Italy
Journal: Frontiers in Earth Science 
Series/Report no.: /8 (2020)
Publisher: Frontiers
Issue Date: 2020
DOI: 10.3389/feart.2020.00169
Keywords: volcano infrasound
infrasound arrays
volcanic degassing
ash explosions
lava flow
Mt. Etna
Subject Classification04.08. Volcanology 
Abstract: The injection of gas and pyroclastic material from volcanic vents into the atmosphere is a prolific source of acoustic waves. Infrasound arrays offer efficient, cost-effective, and near real-time solutions to track the rate and intensity of surface activity at volcanoes. Here, we present a simple framework for the analysis of acoustic array data, based on least-squares beamforming, that allows to evaluate the direction and speed of propagation of acoustic waves between source and array. The algorithms include a new and computationally efficient approach for quantitative assessment of the uncertainty on array measurements based on error propagation theory. We apply the algorithms to new data collected by two 6-element infrasound arrays deployed at Mt. Etna during the period July–August 2019. Our results demonstrate that the use of two infrasound arrays allowed detecting and tracking acoustic sources from multiple craters and active vents associated with degassing and ash-rich explosions, vigorous and frequent Strombolian activity, opening of new eruptive fractures and emplacement of lava flows. Finally, we discuss the potential use of metrics based on infrasound array analyses to inform eruption monitoring operations and early warning at volcanoes characterized by episodic intensification of activity.
Appears in Collections:Article published / in press

Files in This Item:
File Description SizeFormat
2020_feart-08-00169.pdfmanuscript1.56 MBAdobe PDFView/Open
Show full item record

WEB OF SCIENCETM
Citations

2
Last Week
0
Last month
checked on Feb 7, 2021

Page view(s)

16
Last Week
1
Last month
checked on Feb 26, 2021

Download(s)

1
checked on Feb 26, 2021

Google ScholarTM

Check

Altmetric