Journal metrics

Journal metrics

  • IF value: 1.621 IF 1.621
  • IF 5-year value: 1.614 IF 5-year 1.614
  • CiteScore value: 1.61 CiteScore 1.61
  • SNIP value: 0.900 SNIP 0.900
  • SJR value: 0.910 SJR 0.910
  • IPP value: 1.58 IPP 1.58
  • h5-index value: 24 h5-index 24
  • Scimago H index value: 80 Scimago H index 80
Ann. Geophys., 36, 937-943, 2018
https://doi.org/10.5194/angeo-36-937-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Regular paper
26 Jun 2018
Comparison of H component geomagnetic field time series obtained at different sites over South America
Maurício J. A. Bolzan1, Clezio M. Denardini2, and Alexandre Tardelli3 1Astronomy and Space Physics Laboratory – Universidade Federal de Jataí – UFJ, BR 364, km 195, no. 3800, CEP 75801-615, Jataí, Goiás state, Brazil
2Estudo e Monitoramento Brasileiro do Clima Espacial (Embrace), Instituto Nacional de Pesquisas Espaciais – INPE, S. J. Campos, São Paulo state, Brazil
3Physics and Astronomy Laboratory, Universidade do Vale do Paraíba – UNIVAP, S. J. Campos, São Paulo state, Brazil
Abstract. The geomagnetic field in the Brazilian sector is influenced by the South American Magnetic Anomaly (SAMA) that causes a decrease in the magnitude of the local geomagnetic field when compared to other regions in the world. Thus, the magnetometer network and data set of space weather over Brazil led by Embrace are important tools for promoting the understanding of geomagnetic fields over Brazil. In this sense, in this work we used the H component of geomagnetic fields obtained at different sites in South America in order to compare results from the phase coherence obtained from wavelet transform (WT). Results from comparison between Cachoeira Paulista (CXP) and Eusébio (EUS), and Cachoeira Paulista and São Luis (SLZ), indicated that there exist some phenomena that occur simultaneously in both locations, putting them in the same phase coherence. However, there are other phenomena putting both locations in a strong phase difference as observed between CXP and Rio Grande, Argentina (RGA). This study was done for a specific moderate geomagnetic storm that occurred in March 2003. The results are explained in terms of nonlinear interaction between physical phenomena acting in distinct geographic locations and at different times and scales.
Citation: Bolzan, M. J. A., Denardini, C. M., and Tardelli, A.: Comparison of H component geomagnetic field time series obtained at different sites over South America, Ann. Geophys., 36, 937-943, https://doi.org/10.5194/angeo-36-937-2018, 2018.
Publications Copernicus
Download
Share