使用低成本小孔径阵列作为辅助工具,改进亚速尔群岛地区的次声监测工作

IF 1.9 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS pure and applied geophysics Pub Date : 2024-04-15 DOI:10.1007/s00024-024-03469-1
Maria do Céu Jesus, Giacomo Belli, Duccio Gheri, Sandro Matos, Nicolau Wallenstein, Emanuele Marchetti
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引用次数: 0

摘要

亚速尔群岛圣若热岛 2022 年的地震-火山危机为亚速尔群岛大学(UAc)火山学和风险评估研究所(IVAR)与佛罗伦萨大学(UniFI)合作部署便携式次声阵列提供了机会。四元素阵列 SJ1 于 2022 年 4 月 2 日开始运行。尽管在第一阶段部署该阵列是为了监测与圣若热岛火山动荡有关的活动,但 SJ1 阵列是现有国际监测系统次声站 IS42 的辅助工具,IS42 位于格拉西奥萨岛,距离约 40 公里,从而加强了该地区的次声监测网络。这项工作强调了低成本便携式次声阵列在亚速尔群岛地区扩大次声观测覆盖面以实现地方和区域监测目的的重要性。本文简要介绍了两个阵列记录的两个事件:圣若热岛的一次低强度地震和横跨北大西洋的一个火球。将两个阵列的次声数据结合起来,可以快速但仍然准确地确定所分析事件的来源。
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The use of a low-cost, small-aperture array as an auxiliary tool to improve infrasound monitoring in the Azores region

The 2022’s seismo-volcanic crisis on São Jorge Island of the Azores archipelago has provided an opportunity to deploy a portable infrasound array as a collaborative work between the Research Institute for Volcanology and Risk Assessment (IVAR) of the University of the Azores (UAc) and the University of Florence (UniFI). The four-element array, SJ1, became operational on 2 April 2022. Despite being deployed in a first stage to monitor the activities related to the volcanic unrest on São Jorge Island, SJ1 worked as a supporting tool to the existing IMS infrasound station IS42, located on Graciosa Island at ~ 40 km distance, leading to an enhancement of the infrasonic monitoring network in the region. This work emphasises the importance of low-cost portable infrasound arrays to improve the coverage of infrasound observations for local and regional monitoring purposes in the Azores region. Two events recorded by both arrays are briefly exemplified: a low-magnitude earthquake on São Jorge Island and a fireball which crossed the North Atlantic Ocean. Infrasound data from both arrays are combined to obtain a fast but still accurate source localization of the analysed events.

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来源期刊
pure and applied geophysics
pure and applied geophysics 地学-地球化学与地球物理
CiteScore
4.20
自引率
5.00%
发文量
240
审稿时长
9.8 months
期刊介绍: pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.
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