Speaker
Prof.
Jose Valdes-Galicia
(UNAM)
Description
We studied cosmic ray intensity variations in the daily data of the database of the Mexico City neutron monitor station during the period 1990 to 2014 using wavelet transforms to determine the power density function and its time evolution, with which we have identified the mid- and long-term variations present in the registers. We give the corresponding confidence levels for the periodicities found and their relative contribution to the total power of such variations. We also performed a fractal analysis of the time series to identify its intrinsic variations and long term persistency. Consistent results were found with both kinds of analysis. As a reference, we compare these results with those of classical Fourier analysis based on the discrete Fourier transform.
| Registration number following "ICRC2015-I/" | 1974 |
|---|---|
| Collaboration | -- not specified -- |
Author
Prof.
Jose Valdes-Galicia
(UNAM)
Co-author
Dr
Bernardo Vargas-Cardenas
(UNAM)
