Long-range correlations and trends in Colombian seismic time series
| Autor: | Martin-Montoya, L. A., Aranda-Camacho, N. M., Quimbay, C. J. |
|---|---|
| Rok vydání: | 2014 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We study long-range correlations and trends in time series extracted from the data of seismic events occurred from 1973 to 2011 in a rectangular region that contains mainly all the continental part of Colombia. The long-range correlations are detected by the calculation of the Hurst exponents for the time series of interevent intervals, separation distances, depth differences and magnitude differences. By using a modification of the classical $R/S$ method that has been developed to detect short-range correlations in time series, we find the existence of persistence for all the time series considered except for magnitude differences. We find also, by using the $DFA$ until the third order, that the studied time series are not influenced by trends. Additionally, an analysis of the Hurst exponent as a function of the number of events in the time and the maximum window size is presented. Comment: 21 pages, 6 figures, 2 figures added, types corrected, accepted to be published in Physica A |
| Databáze: | arXiv |
| Externí odkaz: |
|