Di Bello, G. and Ragosta, M. and Heinicke, J. and Koch, U. and Lapenna, V. and Piscitelli, S. and Macchiato, M. and Martinelli, G. (1998) Time dynamics of background noise in geoelectrical and geochemical signals: an application in a seismic area of Southern Italy. Il nuovo cimento C, 21 C (6). pp. 609-630. ISSN 1826-9885
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Abstract
We analyse geoelectrical and geochemical time series jointly measured by means of a multiparametric automatic station close to an anomalous fluid emission in Val d’Agri (Basilicata, Italy). The investigated area is located on Southern Apennine chain that in past and recent years was interested by destructive earthquakes. After a complete pre-processing of time series, we analyse the fluctuations triggered by the seasonal cycles and focus our attention on the possible link between geoelectrical and geochemical signals. In order to extract quantitative dynamical information from experimental time series, we detect scaling laws in power spectra that are typical fingerprints of fractional Brownian processes. After this analysis, the problem of the identification of extreme events in the time series has been approached. We consider significant anomalous patterns only when more consecutive values are above/below a fixed threshold in almost two of the time series jointly measured. We give the first preliminary results about the comparison between anomalous patterns detected in geoelectrical and geochemical parameters and the local seismic activity and, finally, analyse the implications with the earthquake prediction problem.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Phenomena related to earthquake prediction |
| Subjects: | 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.2 Vulcani, terremoti, acque termali e gas > 551.22 Terremoti (Classificare qui la Sismologia) (Classificare le onde di maremoto in 551.463) |
| Depositing User: | Marina Spanti |
| Date Deposited: | 28 May 2018 13:52 |
| Last Modified: | 28 May 2018 13:52 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/12867 |
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