Spontaneous Transient Summit Uplift at Taftan Volcano (Makran Subduction Arc) Imaged Using an InSAR Common-Mode Filtering Method

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-10-07 DOI:10.1029/2025gl114853

Mohammadhossein Mohammadnia, Man Wai Yip, A. Alexander G. Webb, Pablo J. González

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引用次数: 0

Abstract

We unambiguously document unrest at Taftan volcano. Summit uplift was detected using Interferometric Synthetic Aperture Radar time series and its timing tightly constrained applying a new common mode filtering method. Uplift started and ended gradually lasting 10 months (July 2023 to May 2024). Uplift peaked at 11 cm/year rates, and during slowing-down several gas emission events occurred. Unrest was triggerless, uncorrelated with rainfall or seismic events. We favor internal driving processes with two possible scenarios: (a) dynamic hydrothermal alteration leading to permeability changes, shallow gas storage and pressurization, followed by opening of degassing pathways; or (b) a minor, undetected deep magmatic intrusion causing volatile exsolution and pore pressure increases within the hydrothermal system. Lack of post-unrest subsidence suggests persistence of hydrothermal high-pressure conditions at the summit and associated hazards. Our study shows how satellite imagery reveals hidden volcanic hazards at Taftan, and the need to implement a holistic volcano risk reduction strategy.

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利用InSAR共模滤波方法成像塔塔坦火山（Makran俯冲弧）自发瞬态峰顶隆起

我们毫不含糊地记录了塔坦火山的动荡。采用一种新的共模滤波方法，利用干涉型合成孔径雷达时间序列对峰顶隆起进行时序严格约束检测。隆起开始和结束逐渐持续了10个月（2023年7月至2024年5月）。隆升的峰值为11厘米/年，在减缓期间发生了几次气体排放事件。动荡是没有诱因的，与降雨或地震事件无关。我们倾向于两种可能的内部驱动过程：(a)动态热液蚀变导致渗透率变化，浅层储气和加压，随后开启脱气通道；或者(b)一个小的，未被发现的深部岩浆侵入，导致热液系统内挥发性析出和孔隙压力增加。不稳定后沉降的缺乏表明在峰顶存在热液高压条件和相关的危险。我们的研究显示了卫星图像如何揭示塔夫坦隐藏的火山危险，以及实施整体火山风险降低战略的必要性。

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

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.