Noise-based passive ballistic wave seismic monitoring on an active volcano
Noise-based passive ballistic wave seismic monitoring on an active volcano
复制标题
基于噪声的活火山被动弹道波地震监测
DOI:
10.1093/gji/ggz466
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发表时间:
2019
影响因子:
2.8
通讯作者:
Nishimura Takeshi
中科院分区:
文献类型:
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作者:
Takano Tomoya;Brenguier Florent;Campillo Michel;Peltier Aline;Nishimura Takeshi
Monitoring temporal changes of volcanic interiors is important to understand magma, fluid pressurization and transport leading to eruptions. Noise-based passive seismic monitoring using coda wave interferometry is a powerful tool to detect and monitor very slight changes in the mechanical properties of volcanic edifices. However, the complexity of coda waves limits our ability to properly image localized changes in seismic properties within volcanic edifices. In this work, we apply a novel passive ballistic wave seismic monitoring approach to examine the active Piton de la Fournaise volcano (La Réunion island). Using noise correlations between two distant dense seismic arrays, we find a 2.4 per cent velocity increase and −0.6 per cent velocity decrease of Rayleigh waves at frequency bands of 0.5–1 and 1–3 Hz, respectively. We also observe a −2.2 per cent velocity decrease of refractedPwaves at 550 m depth at the 6–12 Hz band. We interpret the polarity differences of seismic velocity changes at different frequency bands and for different wave types as being due to strain change complexity at depth associated with subtle pressurization of the shallow magma reservoir. Our results show that velocity changes measured using ballistic waves provide complementary information to interpret temporal changes of the seismic properties within volcanic edifices.
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DOI:
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发表时间:
2009
期刊:
影响因子:
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作者:
E. Prono;J. Battaglia;V. Monteiller;J. Got;V. Ferrazzini
通讯作者:
V. Ferrazzini
影响因子:
2.8
作者:
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Zongbo Xu;T. Mikesell;G. Gribler;A. Mordret
影响因子:
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通讯作者:
U. Wegler;H. Nakahara;C. Sens‐Schönfelder;M. Korn;K. Shiomi
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
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DOI:
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发表时间:
2009
期刊:
影响因子:
--
作者:
A. Peltier;P. Bachèlery;T. Staudacher
通讯作者:
T. Staudacher