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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">57895</article-id>
   <article-id pub-id-type="doi">10.12737/szf-93202301</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">Solar activity cycle 25: the first three years</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>25-й цикл солнечной активности: первые три года</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Язев</surname>
       <given-names>Сергей Арктурович</given-names>
      </name>
      <name xml:lang="en">
       <surname>Yazev</surname>
       <given-names>Sergey Arkturovich</given-names>
      </name>
     </name-alternatives>
     <email>syazev@gmail.com</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"/>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Исаева</surname>
       <given-names>Елена Сергеевна</given-names>
      </name>
      <name xml:lang="en">
       <surname>Isaeva</surname>
       <given-names>Elena Sergeevna</given-names>
      </name>
     </name-alternatives>
     <email>ele3471@yandex.ru</email>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Хос-Эрдэнэ</surname>
       <given-names>Баттулга </given-names>
      </name>
      <name xml:lang="en">
       <surname>Hos-Erdene</surname>
       <given-names>Battulga </given-names>
      </name>
     </name-alternatives>
     <email>battulgakhoserdene.03@gmail.com</email>
     <xref ref-type="aff" rid="aff-4"/>
    </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">Иркутский государственный университет</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Irkutsk State University</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">Иркутский государственный университет</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Irkutsk State University</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-4">
    <aff>
     <institution xml:lang="ru">Иркутский государственный университет</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Irkutsk State University</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2023-09-29T17:23:49+03:00">
    <day>29</day>
    <month>09</month>
    <year>2023</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2023-09-29T17:23:49+03:00">
    <day>29</day>
    <month>09</month>
    <year>2023</year>
   </pub-date>
   <volume>9</volume>
   <issue>3</issue>
   <fpage>5</fpage>
   <lpage>11</lpage>
   <history>
    <date date-type="received" iso-8601-date="2023-03-24T00:00:00+03:00">
     <day>24</day>
     <month>03</month>
     <year>2023</year>
    </date>
    <date date-type="accepted" iso-8601-date="2023-05-11T00:00:00+03:00">
     <day>11</day>
     <month>05</month>
     <year>2023</year>
    </date>
   </history>
   <self-uri xlink:href="https://zh-szf.ru/en/nauka/article/57895/view">https://zh-szf.ru/en/nauka/article/57895/view</self-uri>
   <abstract xml:lang="ru">
    <p>Выполнен анализ особенностей текущего 25-го цикла солнечной активности на протяжении первых трех лет развития (2020–2022 гг.). Показано, что по сравнению с предыдущим 24-м циклом текущий превышает его по количеству групп пятен (в 1.5 раза), числу вспышек (в 1.8 раза), суммарному вспышечному индексу (в 1.5 раза). Выявлены различия в распределениях групп пятен в 24-м и 25-м циклах по максимальной достигаемой площади. Показано, что в 25-м цикле наиболее значимо превышение числа групп пятен с площадями до 30 м.д.п. (1 м.д.п.=3.04•106 км2), а также в интервале от 570 до 1000 м.д.п. В отличие от 24-го цикла, степень северо-южной асимметрии в 25-м цикле существенно понижена. Это позволяет прогнозировать повышенную высоту 25-го цикла (на 20–50 %) в соответствии с правилом Гневышева—Оля, а также возможный одновершинный характер цикла.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>We analyze features of current solar activity cycle 25 for the first three years of its development (2020–2022). Compared to cycle 24, the current cycle is shown to exceed the previous one in the number of sunspot groups (1.5 times), the number of flares (1.8 times), and the total flare index (1.5 times). We have found that distributions of sunspot groups during cycles 24 and 25 differ in maximum area. Solar cycle 25, unlike cycle 24, exhibits the most significant increase in the number of sunspot groups with areas up to 30 pmh and in the interval from 570 to 1000 pmh. In contrast to cycle 24, the degree of north-south asymmetry in cycle 25 is significantly reduced. This allows us to predict an increased height of cycle 25, as compared to cycle 24 (by 20–50 %), in accordance with the Gnevyshev—Ol rule, as well as the possible unimodal nature of the cycle.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>цикл солнечной активности</kwd>
    <kwd>солнечные пятна</kwd>
    <kwd>солнечные вспышки</kwd>
    <kwd>северо-южная асимметрия</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>solar activity cycle</kwd>
    <kwd>sunspots</kwd>
    <kwd>solar flares</kwd>
    <kwd>north-south asymmetry</kwd>
   </kwd-group>
   <funding-group>
    <funding-statement xml:lang="ru">Работа выполнена на УНУ «Астрофизический комплекс МГУ-ИГУ», поддержана Минобрнауки России  (соглашение 13.УНУ.21.0007, госзадание FZZE-2020-0017, FZZE-2020-0024, а также субсидия № 075-ГЗ/Ц3569/278)</funding-statement>
    <funding-statement xml:lang="en">The work was carried out using the Unique Research Facility “Astrophysical complex of MSU-ISU” with financial support from the Ministry of Science and Higher Education of the Russian Federation (Agreement 13.UNU.21.0007, Government Assignment FZZE-2020-0017, FZZE-2020-0024, and Subsidy No. 075-GZ/Ts3569/278)</funding-statement>
   </funding-group>
  </article-meta>
 </front>
 <body>
  <p></p>
 </body>
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