Finite-difference time-domain modeling of transient infrasonic wavefields excited by volcanic explosions
Numerical modeling of waveform diffractions along the rim of a volcano vent shows high correlation to observed explosion signals at Karymsky Volcano, Kamchatka, Russia. The finite difference modeling assumed a gaussian source time function and an axisymmetric geometry. A clear demonstration of the s...
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Blackwell Publishing Ltd
2011
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ftcarolinadr:cdr.lib.unc.edu:vx021q97m 2023-06-11T04:13:34+02:00 Finite-difference time-domain modeling of transient infrasonic wavefields excited by volcanic explosions Kim, K. Lees, J.M. College of Arts and Sciences, Department of Geological Sciences 2011 https://doi.org/10.17615/p746-bh84 https://cdr.lib.unc.edu/downloads/ng451t456?file=thumbnail https://cdr.lib.unc.edu/downloads/ng451t456 English eng Blackwell Publishing Ltd https://doi.org/10.17615/p746-bh84 https://cdr.lib.unc.edu/downloads/ng451t456?file=thumbnail https://cdr.lib.unc.edu/downloads/ng451t456 http://rightsstatements.org/vocab/InC/1.0/ Geophysical Research Letters, 38(6) Kamchatka finite difference method waveform analysis wave field geometry Russian Federation observational method Karymsky Volcano volcanic eruption numerical model Article 2011 ftcarolinadr https://doi.org/10.17615/p746-bh84 2023-05-28T21:02:20Z Numerical modeling of waveform diffractions along the rim of a volcano vent shows high correlation to observed explosion signals at Karymsky Volcano, Kamchatka, Russia. The finite difference modeling assumed a gaussian source time function and an axisymmetric geometry. A clear demonstration of the significant distortion of infrasonic wavefronts was caused by diffraction at the vent rim edge. Data collected at Karymsky in 1997 and 1998 were compared to synthetic waveforms and variations of vent geometry were determined via grid search. Karymsky exhibited a wide range of variation in infrasonic waveforms, well explained by the diffraction, and modeled as changing vent geometry. Rim diffraction of volcanic infrasound is shown to be significant and must be accounted for when interpreting source physics from acoustic observations. Article in Journal/Newspaper Kamchatka Carolina Digital Repository (UNC - University of North Carolina) |
institution |
Open Polar |
collection |
Carolina Digital Repository (UNC - University of North Carolina) |
op_collection_id |
ftcarolinadr |
language |
English |
topic |
Kamchatka finite difference method waveform analysis wave field geometry Russian Federation observational method Karymsky Volcano volcanic eruption numerical model |
spellingShingle |
Kamchatka finite difference method waveform analysis wave field geometry Russian Federation observational method Karymsky Volcano volcanic eruption numerical model Kim, K. Lees, J.M. Finite-difference time-domain modeling of transient infrasonic wavefields excited by volcanic explosions |
topic_facet |
Kamchatka finite difference method waveform analysis wave field geometry Russian Federation observational method Karymsky Volcano volcanic eruption numerical model |
description |
Numerical modeling of waveform diffractions along the rim of a volcano vent shows high correlation to observed explosion signals at Karymsky Volcano, Kamchatka, Russia. The finite difference modeling assumed a gaussian source time function and an axisymmetric geometry. A clear demonstration of the significant distortion of infrasonic wavefronts was caused by diffraction at the vent rim edge. Data collected at Karymsky in 1997 and 1998 were compared to synthetic waveforms and variations of vent geometry were determined via grid search. Karymsky exhibited a wide range of variation in infrasonic waveforms, well explained by the diffraction, and modeled as changing vent geometry. Rim diffraction of volcanic infrasound is shown to be significant and must be accounted for when interpreting source physics from acoustic observations. |
author2 |
College of Arts and Sciences, Department of Geological Sciences |
format |
Article in Journal/Newspaper |
author |
Kim, K. Lees, J.M. |
author_facet |
Kim, K. Lees, J.M. |
author_sort |
Kim, K. |
title |
Finite-difference time-domain modeling of transient infrasonic wavefields excited by volcanic explosions |
title_short |
Finite-difference time-domain modeling of transient infrasonic wavefields excited by volcanic explosions |
title_full |
Finite-difference time-domain modeling of transient infrasonic wavefields excited by volcanic explosions |
title_fullStr |
Finite-difference time-domain modeling of transient infrasonic wavefields excited by volcanic explosions |
title_full_unstemmed |
Finite-difference time-domain modeling of transient infrasonic wavefields excited by volcanic explosions |
title_sort |
finite-difference time-domain modeling of transient infrasonic wavefields excited by volcanic explosions |
publisher |
Blackwell Publishing Ltd |
publishDate |
2011 |
url |
https://doi.org/10.17615/p746-bh84 https://cdr.lib.unc.edu/downloads/ng451t456?file=thumbnail https://cdr.lib.unc.edu/downloads/ng451t456 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Geophysical Research Letters, 38(6) |
op_relation |
https://doi.org/10.17615/p746-bh84 https://cdr.lib.unc.edu/downloads/ng451t456?file=thumbnail https://cdr.lib.unc.edu/downloads/ng451t456 |
op_rights |
http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.17615/p746-bh84 |
_version_ |
1768390735117156352 |