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Geomagnetic Field Variations during the Total Solar Eclipse of 2 July 2019 in La Serena, Chile

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Abstract

The total solar eclipse on July 2, 2019, has been studied by using data of the La Serena ground magnetic station in Chile located in the path of the totality (at geographic coordinates: 29.827° S, 71.261° W). The event reached 100% darkness and occurred from 1522:34 hr to 1746:36 hr LT. We monitored the X, Y, Z‑components of the geomagnetic field with a fluxgate magnetometer to investigate their variation caused by the passing of the Moon in front of the Sun. Our results show positive growth up to ∼12 nT for all components in the same time window during the eclipse and in total synchrony with its phases. Having to discard any effect on the observations such as magnetic and solar activities, seasonal and geographical conditions, and instrumental effects, we report a total increase of the geomagnetic field during this phenomenon.

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ACKNOWLEDGMENTS

The authors thank the support of the Direction of Research and Development of the University of La Serena (DIDULS) through projects PEQ16141, PR18141, and PR18145, and the University of La Serena’s Space and Earth Observatory by the instrumental support that enabled the preparation of this paper. Special thanks go to E. Yizengaw, E. Zesta, M.B. Moldwin and the rest of the AMBER and SAMBA team for the data (http://magnetometers.bc.edu/), and go to F. Espenak, NASA/GSFC Emeritus, by Fig. 1 (https://eclipse.gsfc.nasa.gov/). The Dst index data were obtained from the World Data Center for Geomagnetism of Kyoto (http://wdc.kugi.kyoto-u.ac.jp/).

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Authors and Affiliations

  1. Departamento de Física, Universidad de La Serena, La Serena, Chile

    P. Vega-Jorquera, J. A. Lazzús, L. Tamblay, L. Palma-Chilla, I. Salfate & R. Pacheco

  2. Instituto de Investigación Multidisciplinario en Ciencias y Tecnología, Universidad de La Serena, La Serena, Chile

    J. A. Lazzús

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  1. P. Vega-Jorquera
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  2. J. A. Lazzús
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  3. L. Tamblay
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  4. L. Palma-Chilla
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  5. I. Salfate
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  6. R. Pacheco
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Correspondence to P. Vega-Jorquera, J. A. Lazzús, L. Tamblay, L. Palma-Chilla, I. Salfate or R. Pacheco.

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Vega-Jorquera, P., Lazzús, J.A., Tamblay, L. et al. Geomagnetic Field Variations during the Total Solar Eclipse of 2 July 2019 in La Serena, Chile. Geomagn. Aeron. 61, 287–292 (2021). https://doi.org/10.1134/S0016793221020171

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