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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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.