A Magnetovariational Survey at Lampedusa Island for Investigating the Ambient Noise and the Subsoil Electrical Conductivity

IF 1.9 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

pure and applied geophysics Pub Date : 2024-12-23 DOI:10.1007/s00024-024-03632-8

Mauro Regi, Alfredo Del Corpo, Domenico Di Mauro, Stefania Lepidi, Paolo Bagiacchi, Giovanni Benedetti

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Abstract

We conducted a magnetovariational field investigation at Lampedusa island (Italy), in the proximity to the geomagnetic observatory of Lampedusa. Data were collected from March 19 to March 23, 2022, using vector fluxgate magnetometers, configured in different spatial arrangements for two main purposes: (a) estimating the spatial distribution of potential anthropogenic noise; (b) identifying different conductivity structures beneath the observatory’s surroundings. The results obtained by means of the 1-D gradient method on simultaneous measurements indicate a very low ambient noise level, likely originating north of the geomagnetic observatory. Hypothetical event analysis, combining data from eleven sites with temporary magnetometer installations, reveals the presence of at least three distinct strata in the crust: a highly conductive layer positioned between two more resistive layers, located west of the observatory.

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兰佩杜萨岛环境噪声和地下电导率的磁变测量

我们在意大利兰佩杜萨岛地磁观测站附近进行了磁变场调查。数据采集时间为2022年3月19日至3月23日，使用矢量磁通门磁强计，配置不同的空间布局，主要有两个目的：(a)估算潜在人为噪声的空间分布；(b)识别天文台周围环境下不同的导电性结构。利用一维梯度法同时测量得到的结果表明，一个非常低的环境噪声水平，可能起源于地磁观测站的北部。假设的事件分析，结合11个地点的数据和临时安装的磁力计，揭示了地壳中至少存在三个不同的地层：位于天文台西部的两个电阻层之间的高导电性层。

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来源期刊

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.