Volume Flow Rate Estimation for Small Explosions at Mt. Etna, Italy, From Acoustic Waveform Inversion
Abstract
Rapid assessment of the volume and the rate at which gas and pyroclasts are injected into the atmosphere during volcanic explosions is key to effective eruption hazard mitigation. Here, we use data from a dense infrasound network deployed in 2017 on Mt. Etna, Italy, to estimate eruptive volume flow rates (VFRs) during small gas-and-ash explosions. We use a finite-difference time-domain approximation to compute the acoustic Green's functions and perform a full waveform inversion for a multipole source, combining monopole and horizontal dipole terms. The inversion produces realistic estimates of VFR, on the order of 4 × 104 m3/s and well-defined patterns of source directivity. This is the first application of acoustic waveform inversion at Mt. Etna. Our results demonstrate that acoustic waveform inversion is a mature and robust tool for assessment of source parameters and holds potential as a tool to provide rapid estimates of VFR in near real time.
- Authors:
-
[1];
[2];
[3];
[2];
[4];
[1]
- Univ. of Liverpool (United Kingdom)
- Univ. of Alaska, Fairbanks, AK (United States). Alaska Volcano Observatory, Geophysical Inst.
- Univ. of North Carolina, Chapel Hill, NC (United States). Dept. of Geological Sciences
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Istituto Nazionale di Geofisica e Vulcanologia, Pisa (Italy); Univ. of Granada (Spain)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1601951
- Report Number(s):
- LLNL-JRNL-805799
Journal ID: ISSN 0094-8276; 1011071
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 46; Journal Issue: 20; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- Geosciences; 58 GEOSCIENCES; volcano infrasound; Mt. Etna; waveform inversion; FDTD; volume flow rate; eruption intensity
Citation Formats
Diaz‐Moreno, A., Iezzi, A. M., Lamb, O. D., Fee, D., Kim, K., Zuccarello, L., and De Angelis, S. Volume Flow Rate Estimation for Small Explosions at Mt. Etna, Italy, From Acoustic Waveform Inversion. United States: N. p., 2019.
Web. doi:10.1029/2019GL084598.
Diaz‐Moreno, A., Iezzi, A. M., Lamb, O. D., Fee, D., Kim, K., Zuccarello, L., & De Angelis, S. Volume Flow Rate Estimation for Small Explosions at Mt. Etna, Italy, From Acoustic Waveform Inversion. United States. https://doi.org/10.1029/2019GL084598
Diaz‐Moreno, A., Iezzi, A. M., Lamb, O. D., Fee, D., Kim, K., Zuccarello, L., and De Angelis, S. Tue .
"Volume Flow Rate Estimation for Small Explosions at Mt. Etna, Italy, From Acoustic Waveform Inversion". United States. https://doi.org/10.1029/2019GL084598. https://www.osti.gov/servlets/purl/1601951.
@article{osti_1601951,
title = {Volume Flow Rate Estimation for Small Explosions at Mt. Etna, Italy, From Acoustic Waveform Inversion},
author = {Diaz‐Moreno, A. and Iezzi, A. M. and Lamb, O. D. and Fee, D. and Kim, K. and Zuccarello, L. and De Angelis, S.},
abstractNote = {Rapid assessment of the volume and the rate at which gas and pyroclasts are injected into the atmosphere during volcanic explosions is key to effective eruption hazard mitigation. Here, we use data from a dense infrasound network deployed in 2017 on Mt. Etna, Italy, to estimate eruptive volume flow rates (VFRs) during small gas-and-ash explosions. We use a finite-difference time-domain approximation to compute the acoustic Green's functions and perform a full waveform inversion for a multipole source, combining monopole and horizontal dipole terms. The inversion produces realistic estimates of VFR, on the order of 4 × 104 m3/s and well-defined patterns of source directivity. This is the first application of acoustic waveform inversion at Mt. Etna. Our results demonstrate that acoustic waveform inversion is a mature and robust tool for assessment of source parameters and holds potential as a tool to provide rapid estimates of VFR in near real time.},
doi = {10.1029/2019GL084598},
journal = {Geophysical Research Letters},
number = 20,
volume = 46,
place = {United States},
year = {2019},
month = {10}
}
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