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Table 1.
Data selection: maximum and minimum of solar cycle 23 and 24.
| Solar | Phase | Time interval |
|---|---|---|
| cycle | dd/mm/yyyy | |
| 23 | Maximum | 01/01/2000–30/06/2002 |
| Minimum | 01/07/2005–31/12/2007 | |
| 24 | Maximum | 01/01/2012–30/06/2014 |
| Minimum | 01/07/2016–31/12/2018 | |
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