A preliminary studyof the site-dependence of the multifractalfeatures of geoelectric measurements

• Main Authors: M. Macchiato, V. Lapenna, G. Colangelo, L. Telesca
• Format: Article
• Language: English
• Published: Istituto Nazionale di Geofisica e Vulcanologia (INGV) 2004-06-01
• Series: Annals of Geophysics
• Subjects: self-potential signals; multifractal formalism
• Online Access: http://www.annalsofgeophysics.eu/index.php/annals/article/view/3254
• ISSN: 1593-5213; 2037-416X

Multifractal analysis was performed to characterize the fluctuations in dynamics of the hourly time variability
 of self-potential signals measured from January 2001 to September 2002 by three stations installed in the Basilicata
 region (Southern Italy). Two stations (Giuliano and Tito) are located in a seismic area, and one (Laterza)
 in an aseismic area. Multifractal formalism leads to the identification of a set of parameters derived from the shape of the multifractal spectrum (the maximum a0, the asymmetry B and the width W) and measuring the «complexity» of the signals. Furthermore, the multifractal parameters seem to discriminate self-potential signals
 measured in seismic areas from those recorded in aseismic areas.