Links between volcanic activity and flank creep behavior at Pacaya Volcano, Guatemala

Links between volcanic activity and flank creep behavior at Pacaya Volcano, Guatemala
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危地马拉帕卡亚火山的火山活动与侧翼蠕动行为之间的联系

DOI:
10.1007/s00445-022-01592-2
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发表时间:
2022
影响因子:
3.5
通讯作者:
Burns, Michelle
Burns, Michelle
中科院分区:
地球科学3区
文献类型:
--
作者:
Gonzalez-Santana, Judit;Wauthier, Christelle;Burns, Michelle

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岩浆作用是公认的火山侧翼不稳定的潜在驱动因素。最近,这名司机在危地马拉的帕卡亚火山被发现,2014年那里的一次大喷发加速了西南侧翼的爬行。这项工作调查了帕卡亚火山侧翼蠕变和喷发行为之间的联系,以更好地了解在活火山上启动、维持或停止侧翼蠕变的条件。使用七个合成孔径雷达数据集计算的2007年至2020年地表位移时间序列与火山活动报告、火山灰警告、热异常和熔岩流图进行了比较。我们发现,在2010年和2014年的猛烈喷发期间发生了大的瞬时侧翼不稳定性,而在2007-2009年和2018-2020年类似的活动高峰期则没有发生。在两次暂态不稳定事件发生数年后,在2010-2014年和2015-2018年这两个相对平静的时段,侧翼蠕变仍在继续。在由喷口火山活动引起的火山动荡加剧时期,如2007-2009年和2018-2020年,岩浆在一条开放的管道中迁移,几乎没有相关的变形或侧翼运动。相反,无论这标志着火山喷发的开始或过渡,山顶区域以外的新喷口的打开都可能引发短暂的侧翼蠕动,就像2010年和2014年那样。因此,未来新的岩浆通道的开放,特别是在北西北至南东南的路线上,可能会为帕卡亚新的或加速的侧翼蠕变提供预警。
Magmatism is a recognized potential driver of volcanic flank instability. Recently, this driver was identified at Pacaya Volcano, Guatemala, where a large eruption in 2014 accelerated southwest flank creep. This work investigates the links between flank creep and eruptive behavior at Pacaya to better understand the conditions under which flank creep can be initiated, sustained, or halted at active volcanoes. Time-series of surface displacements from 2007 to 2020 computed using seven Synthetic Aperture Radar datasets are compared with volcanic activity reports, ash advisories, thermal anomalies, and lava flow maps. We find that large transient flank instabilities occurred during vigorous eruptions in 2010 and 2014, but not during times of similarly elevated activity in 2007–2009 and 2018–2020. Flank creep continued years after the two transient instability events, during the relatively quiescent intervals of 2010–2014 and 2015–2018. During periods of elevated volcanic unrest attributed to open-vent volcanic activity, as in 2007–2009 and 2018–2020, magma migrates in an open conduit with little associated deformation or flank motion. Conversely, the opening of new vents outside the summit area, irrespective of whether this marks the start or a transition in an eruption, can initiate transient flank creep as in 2010 and 2014. Thus, future opening of new magma pathways, particularly in a north-northwest to south-southeast alignment, might provide forewarning for an increased likelihood of renewed or accelerating flank creep at Pacaya.
玄武岩复合锥体 50 年来的喷发:危地马拉帕卡亚
DOI: 10.1130/2013.2498(01
发表时间: 2011
影响因子: 2.6
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W. Rose;J. L. Palma;R. Wolf;R. M. Gomez
通讯作者: R. M. Gomez
DOI: 10.1029/2018jb016199
发表时间: 2019-01
期刊: Journal of Geophysical Research: Solid Earth
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K. Reath;M. Pritchard;M. Poland;F. Delgado;S. Carn;D. Coppola;B. Andrews;S. Ebmeier;E. Rumpf;S. Henderson;S. Baker;P. Lundgren;Rosalind J Wright;J. Biggs;T. Lopez;C. Wauthier;S. Moruzzi;A. Alcott;R. Wessels;J. Griswold;S. Ogburn;S. Loughlin;F. Meyer;G. Vaughan;M. Bagnardi
通讯作者: K. Reath;M. Pritchard;M. Poland;F. Delgado;S. Carn;D. Coppola;B. Andrews;S. Ebmeier;E. Rumpf;S. Henderson;S. Baker;P. Lundgren;Rosalind J Wright;J. Biggs;T. Lopez;C. Wauthier;S. Moruzzi;A. Alcott;R. Wessels;J. Griswold;S. Ogburn;S. Loughlin;F. Meyer;G. Vaughan;M. Bagnardi
DOI: 10.1007/978-3-030-57411-6_4
发表时间: 2020
影响因子: 2.9
作者:
A. Dufresne;L. Siebert;B. Bernard
通讯作者: B. Bernard
InSAR揭示了危地马拉帕卡亚火山岩浆过程引起的地表变形
DOI: 10.1016/j.jvolgeores.2017.06.024
发表时间: 2017
影响因子: 2.9
作者:
K. Wnuk;C. Wauthier
通讯作者: C. Wauthier
DOI: 10.1016/j.jvolgeores.2011.12.001
发表时间: 2012-02-15
影响因子: 2.9
作者:
Coppola, D.;Piscopo, D.;Ripepe, M.
通讯作者: Ripepe, M.