Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24
In this study, we performed periodicity analyses of selected daily solar (flare index, coronal index, number of coronal mass ejections), geomagnetic (planetary equivalent range index, disturbance storm time index, interplanetary magnetic field) and cosmic ray indices for the last Solar Cycle 24 (fro...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-02-01
|
| Series: | Universe |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2218-1997/10/3/107 |
| _version_ | 1797239204277649408 |
|---|---|
| author | Ali Kilcik Jean-Pierre Rozelot Atila Ozguc |
| author_facet | Ali Kilcik Jean-Pierre Rozelot Atila Ozguc |
| author_sort | Ali Kilcik |
| collection | DOAJ |
| description | In this study, we performed periodicity analyses of selected daily solar (flare index, coronal index, number of coronal mass ejections), geomagnetic (planetary equivalent range index, disturbance storm time index, interplanetary magnetic field) and cosmic ray indices for the last Solar Cycle 24 (from December 2008 to December 2019). To study the periodic variation of the above-listed datasets, the following analysis methods were applied; multi-taper method, Morlet wavelet, cross-wavelet transform and wavelet coherence analysis. The outcome of our analyses revealed the following. (i) The 25–33 days solar rotation periodicities exist in all datasets without any exception in the MTM power spectra. (ii) Except for the solar rotation periodicity, all periods show data preference, and they appear around the investigated cycle’s maximum phase. (iii) When comparing the phase relations between periodicities in the used datasets, they exhibit a gradual transition from small to large periods. For short-term periodicities, there are no phase relations but a mixed phase, whereas for high periodicities, there are complete phase/antiphase transitions. (iv) All identified flare index periodicities are common to all other datasets examined in this investigation. |
| first_indexed | 2024-04-24T17:47:49Z |
| format | Article |
| id | doaj.art-f0dfd6372b5940a0b3f22a0b19e5d236 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-04-24T17:47:49Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-f0dfd6372b5940a0b3f22a0b19e5d2362024-03-27T14:06:36ZengMDPI AGUniverse2218-19972024-02-0110310710.3390/universe10030107Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24Ali Kilcik0Jean-Pierre Rozelot1Atila Ozguc2Department of Space Science and Technologies, Faculty of Science, Akdeniz University, Antalya 07058, TurkeyObservatoire de la Côte d’Azur, Université de la Côte d’Azur (Emeritus), 77 Chemin des Basses Moulières, 06130 Grasse, FranceKandilli Observatory and Earthquake Research Institute, Bogazici University, Istanbul 34684, TurkeyIn this study, we performed periodicity analyses of selected daily solar (flare index, coronal index, number of coronal mass ejections), geomagnetic (planetary equivalent range index, disturbance storm time index, interplanetary magnetic field) and cosmic ray indices for the last Solar Cycle 24 (from December 2008 to December 2019). To study the periodic variation of the above-listed datasets, the following analysis methods were applied; multi-taper method, Morlet wavelet, cross-wavelet transform and wavelet coherence analysis. The outcome of our analyses revealed the following. (i) The 25–33 days solar rotation periodicities exist in all datasets without any exception in the MTM power spectra. (ii) Except for the solar rotation periodicity, all periods show data preference, and they appear around the investigated cycle’s maximum phase. (iii) When comparing the phase relations between periodicities in the used datasets, they exhibit a gradual transition from small to large periods. For short-term periodicities, there are no phase relations but a mixed phase, whereas for high periodicities, there are complete phase/antiphase transitions. (iv) All identified flare index periodicities are common to all other datasets examined in this investigation.https://www.mdpi.com/2218-1997/10/3/107solar cyclessolar flaresgeomagnetic activity indicescosmic raysperiod analyses |
| spellingShingle | Ali Kilcik Jean-Pierre Rozelot Atila Ozguc Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24 Universe solar cycles solar flares geomagnetic activity indices cosmic rays period analyses |
| title | Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24 |
| title_full | Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24 |
| title_fullStr | Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24 |
| title_full_unstemmed | Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24 |
| title_short | Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24 |
| title_sort | periodic behavior of selected solar geomagnetic and cosmic activity indices during solar cycle 24 |
| topic | solar cycles solar flares geomagnetic activity indices cosmic rays period analyses |
| url | https://www.mdpi.com/2218-1997/10/3/107 |
| work_keys_str_mv | AT alikilcik periodicbehaviorofselectedsolargeomagneticandcosmicactivityindicesduringsolarcycle24 AT jeanpierrerozelot periodicbehaviorofselectedsolargeomagneticandcosmicactivityindicesduringsolarcycle24 AT atilaozguc periodicbehaviorofselectedsolargeomagneticandcosmicactivityindicesduringsolarcycle24 |