Articles | Volume 3, issue 1
Solid Earth, 3, 131–148, 2012
Solid Earth, 3, 131–148, 2012

Method article 09 May 2012

Method article | 09 May 2012

Geomagnetic jerks characterization via spectral analysis

B. Duka1, A. De Santis2,3, M. Mandea4, A. Isac5, and E. Qamili2 B. Duka et al.
  • 1Faculty of Natural Sciences, University of Tirana, Tirana, Albania
  • 2Istituto Nazionale di Geofisica e Vulcanologia, Roma, Italy
  • 3Universita' G. D'Annunzio, Chieti, Italy
  • 4Centre National d'Etudes Spatiales, Paris, France
  • 5Geological Institute of Romania, Bucharest, Romania

Abstract. In this study we have applied spectral techniques to analyze geomagnetic field time-series provided by observatories, and compared the results with those obtained from analogous analyses of synthetic data estimated from models. Then, an algorithm is here proposed to detect the geomagnetic jerks in time-series, mainly occurring in the eastern component of the geomagnetic field. Applying such analysis to time-series generated from global models has allowed us to depict the most important space-time features of the geomagnetic jerks all over the globe, since the beginning of XXth century. Finally, the spherical harmonic power spectrum of the third derivative of the main geomagnetic field has been computed from 1960 to 2002.5, bringing new insights to understand the spatial evolution of these rapid changes of the geomagnetic field.