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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Solnechno-Zemnaya Fizika</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Solnechno-Zemnaya Fizika</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Солнечно-земная физика</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="online">2712-9640</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">50540</article-id>
   <article-id pub-id-type="doi">10.12737/szf-84202202</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Результаты  исследований</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>Results of current research</subject>
    </subj-group>
    <subj-group>
     <subject>Результаты  исследований</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Appearance of active regions at the end of solar cycle 24 and at the beginning of cycle 25</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Появление активных областей в период завершения 24-го и начала 25-го циклов активности</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Григорьев</surname>
       <given-names>Виктор Михайлович</given-names>
      </name>
      <name xml:lang="en">
       <surname>Grigoryev</surname>
       <given-names>Victor Mikhailovich</given-names>
      </name>
     </name-alternatives>
     <email>vgrig@iszf.irk.ru</email>
     <bio xml:lang="ru">
      <p>доктор физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>doctor of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Ермакова</surname>
       <given-names>Людмила Викторовна</given-names>
      </name>
      <name xml:lang="en">
       <surname>Ermakova</surname>
       <given-names>Lyudmila Victorovna</given-names>
      </name>
     </name-alternatives>
     <email>lermak@iszf.irk.ru</email>
     <bio xml:lang="ru">
      <p>кандидат физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Хлыстова</surname>
       <given-names>Анна Иннокентьевна</given-names>
      </name>
      <name xml:lang="en">
       <surname>Khlystova</surname>
       <given-names>Anna Innokentyevna</given-names>
      </name>
     </name-alternatives>
     <email>hlystova@iszf.irk.ru</email>
     <bio xml:lang="ru">
      <p>кандидат физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Институт солнечно-земной физики СО РАН</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Institute of Solar-Terrestrial Physics SB RAS</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Институт солнечно-земной физики СО РАН</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Institute of Solar-Terrestrial Physics SB RAS</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">Институт солнечно-земной физики СО РАН</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Institute of Solar Terrestrial Physics SB RAS</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2022-12-24T19:09:02+03:00">
    <day>24</day>
    <month>12</month>
    <year>2022</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2022-12-24T19:09:02+03:00">
    <day>24</day>
    <month>12</month>
    <year>2022</year>
   </pub-date>
   <volume>8</volume>
   <issue>4</issue>
   <fpage>29</fpage>
   <lpage>37</lpage>
   <history>
    <date date-type="received" iso-8601-date="2022-05-18T00:00:00+03:00">
     <day>18</day>
     <month>05</month>
     <year>2022</year>
    </date>
    <date date-type="accepted" iso-8601-date="2022-09-15T00:00:00+03:00">
     <day>15</day>
     <month>09</month>
     <year>2022</year>
    </date>
   </history>
   <self-uri xlink:href="https://naukaru.ru/en/nauka/article/50540/view">https://naukaru.ru/en/nauka/article/50540/view</self-uri>
   <abstract xml:lang="ru">
    <p>Изучение пространственно-временной картины появления активных областей и связи их возникновения со структурой и развитием крупномасштабного магнитного поля (КМП) проводилось в период смены 24-го и 25-го циклов солнечной активности. В этот период не отмечается бурного развития активности и поэтому динамика КМП в процессе появления новых активных областей наиболее заметна. Использовались данные SDO/HMI о продольном магнитном поле для определения времени и гелиографических координат места возникновения активной области и ежедневные карты WSO (Wilcox Solar Observatory) для сравнения со структурой КМП. Получены следующие результаты. В переходный период от одного цикла к другому новые активные области возникали в половине случаев на границе раздела полярностей КМП, причем почти исключительно на хейловских границах в соответствующих полусферах и циклах активности. В остальных случаях местом возникновения были униполярные области КМП без видимого преимущества в расположении областей поля по правилу Хейла. Образование активных областей предваряется или сопровождается изменениями в структуре КМП, при этом в тонкой структуре магнитного поля в фотосфере может наблюдаться усиление сетки магнитного поля на пространственном масштабе размера супергранул и более, а также появление малых областей нового магнитного поля обеих полярностей. Возникающие активные области концентрировались в двух узких долготных зонах, которые покрывали обе полусферы Солнца. Новый цикл начинался в тех же долготных зонах, где затухала активность старого цикла.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>The spatial-temporal picture of appearance of active regions and the relationship of their appearance with the structure and development of a large-scale magnetic field were studied during the transition from solar cycle 24 to 25. During this period, solar activity is low, and therefore the dynamics of a large-scale magnetic field in the appearance of new active regions is most noticeable. We have used SDO/HMI data on the longitudinal magnetic field to determine the time and heliographic coordinates of the origin of an active region, as well as daily WSO maps (Wilcox Solar Observatory) to compare with the structure of the large-scale magnetic field. We have obtained the following results. During the transition from one cycle to another, new active regions appeared in half of the cases in the polarity inversion line of the large-scale magnetic field, and almost exclusively at the Hale boundaries in the corresponding hemispheres and solar cycles. In other cases, the places of appearance were unipolar regions of the large-scale magnetic field without a clear advantage in the location of the field regions according to the Hale law. The formation of active regions is preceded or accompanied by changes in the structure of the large-scale magnetic field. At the same time, in the fine structure of the magnetic field in the photosphere we can observe an increase in the magnetic field network on a spatial scale of the size of supergranules and larger, as well as the appearance of small regions of a new magnetic field of both polarities. The appearing active regions were concentrated in two narrow longitudinal zones that covered both hemispheres of the Sun. The new cycle began in the same longitudinal zones, where the activity of the old cycle decayed.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>магнитное поле</kwd>
    <kwd>активные области</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>magnetic field</kwd>
    <kwd>active regions</kwd>
   </kwd-group>
   <funding-group>
    <funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Минобрнауки России (субсидия № 075-ГЗ/Ц3569/278)</funding-statement>
    <funding-statement xml:lang="en">The work was financially supported by the Ministry of Science and Higher Education of the Russian Federation (Grant No. 075-GZ/Ts3569/278)</funding-statement>
   </funding-group>
  </article-meta>
 </front>
 <body>
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