Seismic activity that accompanied the lava dome eruptions at andesitic Volcán de Colima (2016–2017) and dacitic Mount St. Helens (2004–2008)

IF 2.4 3区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Journal of Volcanology and Geothermal Research Pub Date : 2025-05-06 DOI:10.1016/j.jvolgeores.2025.108353

Vyacheslav M. Zobin

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引用次数: 0

Abstract

Lava domes are formed when the erupted lava is too viscous to flow freely away from the vent. All processes of lava domes growth and destruction are accompanied with seismic activity. This article presents the comparative analysis of the seismic signals, recorded during the episodes of lava dome eruptions at andesitic Volcán de Colima and dacitic Mount St Helens. The seismic signals, associated with two end-member styles of lava dome growth: endogenous at Volcán de Colima, in which new lava is added to the interior of an inflating dome, and exogenous at Mount St Helens, in which new lava accumulates as the lava spines on the dome surface, are discussed. The difference in the characteristic features of the endogenous and exogenous styles of the lava dome building and destruction, reflected in the seismic signals, is demonstrated. The most reason for the noted difference of the seismic development of these two eruptions is proposed to be in the difference in the gas-filling properties of magma, gas-rich at Volcán de Colima and gas-poor at Mount St Helens.

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伴随安山岩Volcán de Colima熔岩穹丘喷发的地震活动（2016-2017）和安山岩St. Helens火山（2004-2008）

熔岩穹丘形成于喷发的熔岩过于粘稠而无法从火山口自由流出时。熔岩穹丘的生长和破坏过程都伴随着地震活动。本文对安山岩质Volcán de Colima火山和英安质圣海伦火山熔岩穹丘喷发期间记录的地震信号进行了比较分析。本文讨论了与两种端元熔岩穹丘生长方式相关的地震信号：在Volcán de Colima的内源性，新熔岩被添加到膨胀穹丘的内部；在St Helens的外源性，新熔岩以熔岩棘的形式在穹丘表面积累。从地震信号上反映出岩浆穹窿形成和破坏的内源和外源风格特征的差异。这两次喷发的地震发育有显著差异的最主要原因是岩浆的充气性不同，Volcán de Colima的富气性和St Helens的贫气性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Volcanology and Geothermal Research 地学-地球科学综合

CiteScore

5.90

自引率

13.80%

发文量

183

审稿时长

19.7 weeks

期刊介绍： An international research journal with focus on volcanic and geothermal processes and their impact on the environment and society. Submission of papers covering the following aspects of volcanology and geothermal research are encouraged: (1) Geological aspects of volcanic systems: volcano stratigraphy, structure and tectonic influence; eruptive history; evolution of volcanic landforms; eruption style and progress; dispersal patterns of lava and ash; analysis of real-time eruption observations. (2) Geochemical and petrological aspects of volcanic rocks: magma genesis and evolution; crystallization; volatile compositions, solubility, and degassing; volcanic petrography and textural analysis. (3) Hydrology, geochemistry and measurement of volcanic and hydrothermal fluids: volcanic gas emissions; fumaroles and springs; crater lakes; hydrothermal mineralization. (4) Geophysical aspects of volcanic systems: physical properties of volcanic rocks and magmas; heat flow studies; volcano seismology, geodesy and remote sensing. (5) Computational modeling and experimental simulation of magmatic and hydrothermal processes: eruption dynamics; magma transport and storage; plume dynamics and ash dispersal; lava flow dynamics; hydrothermal fluid flow; thermodynamics of aqueous fluids and melts. (6) Volcano hazard and risk research: hazard zonation methodology, development of forecasting tools; assessment techniques for vulnerability and impact.