A study of geomagnetic field variations along the 80° S geomagnetic parallel

Lepidi, S.; Cafarella, L.; Francia, P.; Piancatelli, A.; Pietrolungo, M.; Santarelli, L.; Urbini, Stefano

doi:10.5194/angeo-35-139-2017

Cited by 2 publications

(2 citation statements)

References 24 publications

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“…(7), during a period characterized by high Pc5 activity. We selected the event on 11 March 2008 (Lepidi et al, 2017) and compared the polarization patterns at TLD and TNB. The azimuthal angle θ , the polarization ratio R and ellipticity were examined on the basis of Fowler et al (1967) polarization analysis, performed using a moving window of 2 h with a step size of 1 min.…”

Section: Vertical and Horizontal Transfer Functions Using The Interstmentioning

confidence: 99%

“…As pointed out by Schmucker (1970) and Viljanen et al (1995) (see also Fujiwara and Tou, 1996;Beamish, 1982;Vujić and Brkić, 2016), a suitable analysis in both vertical and horizontal components can be assessed by using a reference station, which should be ideally far away from the ground anomalies (i.e., from the coast). In this regard, we used as a reference station the temporary installation at Talos Dome (TLD, ∼ 80 • S), deployed during the 2007-2008 Antarctic campaign at ∼ 270 and 560 km from TNB and SBA, respectively, and operating during 18 January-14 March 2008 (Lepidi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range

et al. 2018

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Abstract. We examined the coast effect in Antarctica along the 80 • S magnetic parallel. We used the geomagnetic field measurements at the two coastal stations of Mario Zucchelli Station and Scott Base, and, as a reference, at the inland temporary station Talos Dome, during 18 January-14 March 2008. Spectral analysis in the Pc5 frequency range (1-7 mHz) revealed large differences between coastal and inland stations, such as higher spectral power levels in the vertical component and higher coherence between horizontal and vertical components at coastal stations. Using the interstation method on selected active time intervals, with Talos Dome as a remote reference station, we found that remote reference induction arrows are directed almost perpendicularly with respect to their respective coastlines. Moreover, the singlestation analysis shows that at Talos Dome the amplitude of the induction arrows is much smaller than at coastal stations. These results clearly indicate that coast effect at a few hundred kilometers from the coastline is relatively small. The coast effect on polarization parameters was examined, for a Pc5 event that occurred on 11 March 2008. The results evidenced that the azimuthal angle of polarized signals at one of the coastal stations is largely different with respect to the inland station (by ∼ 110 • ), while the polarization ratio and ellipticity attain comparable values. We proposed a correction method of the polarization parameters, which operates directly in the frequency domain, obtaining comparable azimuthal angles at coastal and inland stations.

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Section: Vertical and Horizontal Transfer Functions Using The Interstmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range

et al. 2018

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A New Installation for Geomagnetic Field Monitoring at Talos Dome, a Remote Antarctic Site Away from Permanent Observatories

Santarelli

Bagiacchi²,

Benedetti³

et al. 2023

Remote Sensing

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An automatic geomagnetic station for monitoring the Earth’s magnetic field variations was installed in December 2020 at Talos Dome, a remote site on the Antarctic Plateau, about 300 km away from the permanent geomagnetic observatory at Mario Zucchelli Station (MZS). Designed and assembled at the laboratory of electronics of the Istituto Nazionale di Geofisica e Vulcanologia (INGV) in Rome, this autonomous station is formed by a vector magnetometer specifically manufactured by Lviv Institute (Ukraine) for very low temperatures and a low-power system supplied by batteries charged by a wind generator and solar panel. Data, sampled at 1 Hz, are locally stored and can be downloaded once a year during the Antarctic summer expeditions. The goal was to integrate observatory data for better monitoring the geomagnetic field from an uncovered Antarctic area. In fact, it is well known that the distribution of geomagnetic observatories strongly favors the northern hemisphere, and each new instrumental installation in Antarctica should be considered as a useful attempt to balance the geomagnetic monitoring in the two hemispheres. The achieved goal was to obtain a long data series, keeping the station working even during the austral winter when the temperature can reach −60 °C; we recorded almost 11 months of data in one year and the station is still operating. Data from the new station, jointly with data from permanent observatories, improve the analysis of the magnetospheric dynamics and the ionosphere–magnetosphere coupling. Talos Dome, together with the Italian geomagnetic observatory at Mario Zucchelli Station and New Zealand geomagnetic observatory at Scott Base, constitutes a network along the 80°S geomagnetic parallel, which is interesting for studying the longitudinal propagation of geomagnetic signals of external origin. In this work we present the characteristics of the station and of the data it provides, with the aim of them for analysis in the framework of space weather.

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A study of geomagnetic field variations along the 80° S geomagnetic parallel

Cited by 2 publications

References 24 publications

The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range

The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range

A New Installation for Geomagnetic Field Monitoring at Talos Dome, a Remote Antarctic Site Away from Permanent Observatories

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A study of geomagnetic field variations along the 80° S geomagnetic parallel

Cited by 2 publications

References 24 publications

The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range

The geomagnetic coast effect at two 80° S stations in Antarctica, observed in the ULF range

A New Installation for Geomagnetic Field Monitoring at Talos Dome, a Remote Antarctic Site Away from Permanent Observatories

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A study of geomagnetic field variations along the 80° S geomagnetic parallel