Peculiarities of the geomagnetic field secular variations at the 20th solar activity cycle
The decrease of solar and; correspondingly; geomagnetic activities at the 20th cycle has reflected on the secular variations of the geomagnetic field. On the continental magnetic observatories of the Earth north hemisphere (Europe and North America) the effect was positive and maximal amplitude was...
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| Datum: | 2018 |
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S. Subbotin Institute of Geophysics of the NAS of Ukraine
2018
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| Online Zugang: | https://journals.uran.ua/geofizicheskiy/article/view/137199 |
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| Назва журналу: | Geofizicheskiy Zhurnal |
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Geofizicheskiy Zhurnal| _version_ | 1856543377946836992 |
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| author | Sumaruk, T. P. Sumaruk, P. V. |
| author_facet | Sumaruk, T. P. Sumaruk, P. V. |
| author_sort | Sumaruk, T. P. |
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| collection | OJS |
| datestamp_date | 2020-10-07T11:11:45Z |
| description | The decrease of solar and; correspondingly; geomagnetic activities at the 20th cycle has reflected on the secular variations of the geomagnetic field. On the continental magnetic observatories of the Earth north hemisphere (Europe and North America) the effect was positive and maximal amplitude was observed at the region of geomagnetic and magnetic poles. If the latitudes of the observatories diminishes amplitude of the effect also decreased and was about zero at the latitudes less 45°. At the Asia; the effect was negative and its maximal amplitude was observed at the observatory IRT. The sign of the effect changes at longitudes 60° (observatory KZN) and 150°—180° (observatory CWE; BRW). At the african and south America observatories the effect was not observed. The most probably; it was result of total variations from external and internal sources and the nearness of observatories to the geomagnetic equator. At Earth’s south hemisphere; the most of the observatories are costal or are placed on the is-lands. The effect was not observed at these observatories. Maybe the induction current of ocean flows compensates the external variations. At the Antarctic continent the little amplitude effect was observed at the south magnetic pole region (DRV). |
| first_indexed | 2025-07-17T11:09:57Z |
| format | Article |
| id | journalsuranua-geofizicheskiy-article-137199 |
| institution | Geofizicheskiy Zhurnal |
| language | Ukrainian |
| last_indexed | 2025-07-17T11:09:57Z |
| publishDate | 2018 |
| publisher | S. Subbotin Institute of Geophysics of the NAS of Ukraine |
| record_format | ojs |
| spelling | journalsuranua-geofizicheskiy-article-1371992020-10-07T11:11:45Z Peculiarities of the geomagnetic field secular variations at the 20th solar activity cycle Особенности возрастных вариаций геомагнитного поля в 20-м цикле солнечной активности Особливості вікових варіацій геомагнітного поля у 20-му циклі сонячної активності Sumaruk, T. P. Sumaruk, P. V. secular variations solar activity geomagnetic activity magnetospheric and ionospheric sources The decrease of solar and; correspondingly; geomagnetic activities at the 20th cycle has reflected on the secular variations of the geomagnetic field. On the continental magnetic observatories of the Earth north hemisphere (Europe and North America) the effect was positive and maximal amplitude was observed at the region of geomagnetic and magnetic poles. If the latitudes of the observatories diminishes amplitude of the effect also decreased and was about zero at the latitudes less 45°. At the Asia; the effect was negative and its maximal amplitude was observed at the observatory IRT. The sign of the effect changes at longitudes 60° (observatory KZN) and 150°—180° (observatory CWE; BRW). At the african and south America observatories the effect was not observed. The most probably; it was result of total variations from external and internal sources and the nearness of observatories to the geomagnetic equator. At Earth’s south hemisphere; the most of the observatories are costal or are placed on the is-lands. The effect was not observed at these observatories. Maybe the induction current of ocean flows compensates the external variations. At the Antarctic continent the little amplitude effect was observed at the south magnetic pole region (DRV). Исследовано влияние резкого уменьшения солнечной активности в 20-м цикле на вековые вариации геомагнитного поля. Показано, что уменьшение солнечной активности привело к росту абсолютных значений BB (T). Эффект имеет максимальную амплитуду в районах северного магнитного полюса Земли (положительные значения) и на обс. Иркутск (отрицательные значения). В южном полушарии эффект небольшой амплитуды наблюдается вблизи южного магнитного полюса (обс. Дюмон Д’Юрвиль). Амплитуда эффекта резко уменьшается с уменьшением широты магнитной обсерватории. На околоэкваториальных и на островных обсерваториях эффект не наблюдается. Досліджено вплив різкого зменшення сонячної активності в 20-му циклі на вікові варіації геомагнітного поля. Показано, що зменшення сонячної активності призвело до зростання абсолютних значень BB (T). Ефект має максимальну амплітуду в районах північного магнітного полюса Землі (позитивні значення) і на обс. Іркутськ (негативні значення). У південній півкулі ефект невеликої амплітуди спостерігається поблизу південного магнітного полюса (обс. Дюмон Д'юрвіля). Амплітуда ефекту різко зменшується зі зменшенням широти магнітної обсерваторії. На околоекваторіальних і на острівних обсерваторіях ефект не спостерігається. S. Subbotin Institute of Geophysics of the NAS of Ukraine 2018-07-25 Article Article application/pdf https://journals.uran.ua/geofizicheskiy/article/view/137199 10.24028/gzh.0203-3100.v40i3.2018.137199 Geofizicheskiy Zhurnal; Vol. 40 No. 3 (2018); 179-191 Геофизический журнал; Том 40 № 3 (2018); 179-191 Геофізичний журнал; Том 40 № 3 (2018); 179-191 2524-1052 0203-3100 uk https://journals.uran.ua/geofizicheskiy/article/view/137199/195665 Copyright (c) 2020 Geofizicheskiy Zhurnal https://creativecommons.org/licenses/by/4.0 |
| spellingShingle | secular variations solar activity geomagnetic activity magnetospheric and ionospheric sources Sumaruk, T. P. Sumaruk, P. V. Peculiarities of the geomagnetic field secular variations at the 20th solar activity cycle |
| title | Peculiarities of the geomagnetic field secular variations at the 20th solar activity cycle |
| title_alt | Особенности возрастных вариаций геомагнитного поля в 20-м цикле солнечной активности Особливості вікових варіацій геомагнітного поля у 20-му циклі сонячної активності |
| title_full | Peculiarities of the geomagnetic field secular variations at the 20th solar activity cycle |
| title_fullStr | Peculiarities of the geomagnetic field secular variations at the 20th solar activity cycle |
| title_full_unstemmed | Peculiarities of the geomagnetic field secular variations at the 20th solar activity cycle |
| title_short | Peculiarities of the geomagnetic field secular variations at the 20th solar activity cycle |
| title_sort | peculiarities of the geomagnetic field secular variations at the 20th solar activity cycle |
| topic | secular variations solar activity geomagnetic activity magnetospheric and ionospheric sources |
| topic_facet | secular variations solar activity geomagnetic activity magnetospheric and ionospheric sources |
| url | https://journals.uran.ua/geofizicheskiy/article/view/137199 |
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