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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Solar-Terrestrial Physics</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Solar-Terrestrial Physics</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Солнечно-земная физика / Solnechno-Zemnaya Fizika / Solar-Terrestrial Physics</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">95939</article-id>
   <article-id pub-id-type="doi">10.12737/szf-113202506</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>ДВАДЦАТАЯ ЕЖЕГОДНАЯ КОНФЕРЕНЦИЯ «ФИЗИКА ПЛАЗМЫ В СОЛНЕЧНОЙ СИСТЕМЕ», 10–14 ФЕВРАЛЯ 2025 Г., ИНСТИТУТ КОСМИЧЕСКИХ ИССЛЕДОВАНИЙ РАН, МОСКВА, РОССИЯ</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>20TH ANNUAL CONFERENCE “PLASMA PHYSICS IN THE SOLAR SYSTEM”. FEBRUARY 10–14, 2025, SPACE RESEARCH INSTITUTE RAS, MOSCOW, RUSSIA</subject>
    </subj-group>
    <subj-group>
     <subject>ДВАДЦАТАЯ ЕЖЕГОДНАЯ КОНФЕРЕНЦИЯ «ФИЗИКА ПЛАЗМЫ В СОЛНЕЧНОЙ СИСТЕМЕ», 10–14 ФЕВРАЛЯ 2025 Г., ИНСТИТУТ КОСМИЧЕСКИХ ИССЛЕДОВАНИЙ РАН, МОСКВА, РОССИЯ</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Studying dynamics of energy spectrum of solar diurnal variations in cosmic rays during solar activity cycles 20–25, using method of crossed muon telescopes</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Исследование динамики энергетического спектра солнечно-суточных вариаций космических лучей в 20–25 циклах солнечной активности методом скрещенных мюонных телескопов</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2184-8089</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Гололобов</surname>
       <given-names>Петр Юрьевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Gololobov</surname>
       <given-names>Peter Yur'evich</given-names>
      </name>
     </name-alternatives>
     <email>gpeter@ikfia.sbras.ru</email>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1348-4708</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Григорьев</surname>
       <given-names>Владислав Георгиевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Grigoryev</surname>
       <given-names>Vladislav Georgievich</given-names>
      </name>
     </name-alternatives>
     <email>grig@ikfia.ysn.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">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1247-4513</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Герасимова</surname>
       <given-names>Сардаана Кимовна</given-names>
      </name>
      <name xml:lang="en">
       <surname>Gerasimova</surname>
       <given-names>Sardaana Kimovna</given-names>
      </name>
     </name-alternatives>
     <email>danagsk@mail.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 космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН</institution>
     <city>Якутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS</institution>
     <city>Yakutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Институт космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН</institution>
     <city>Якутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS</institution>
     <city>Yakutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">Институт космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН</institution>
     <city>Якутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS</institution>
     <city>Yakutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2025-09-22T08:08:22+03:00">
    <day>22</day>
    <month>09</month>
    <year>2025</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2025-09-22T08:08:22+03:00">
    <day>22</day>
    <month>09</month>
    <year>2025</year>
   </pub-date>
   <volume>11</volume>
   <issue>3</issue>
   <fpage>50</fpage>
   <lpage>55</lpage>
   <history>
    <date date-type="received" iso-8601-date="2025-03-10T00:00:00+03:00">
     <day>10</day>
     <month>03</month>
     <year>2025</year>
    </date>
    <date date-type="accepted" iso-8601-date="2025-05-27T00:00:00+03:00">
     <day>27</day>
     <month>05</month>
     <year>2025</year>
    </date>
   </history>
   <self-uri xlink:href="https://naukaru.ru/en/nauka/article/95939/view">https://naukaru.ru/en/nauka/article/95939/view</self-uri>
   <abstract xml:lang="ru">
    <p>Регистрируемая наземными детекторами интенсивность космических лучей (КЛ) испытывает солнечно-суточные вариации (ССВ), связанные с существованием в околоземном космическом пространстве анизотропного углового распределения КЛ. Долговременные наблюдения показывают, что ССВ обнаруживают зависимость от цикла солнечной активности, испытывая периодические 11- и 22-летние вариации. Такое поведение ССВ связано с изменением характера распространения галактических КЛ в гелиосфере при изменениях ее состояния в цикле солнечной активности. С другой стороны, указанное явление может быть частично обусловлено изменением величины сноса КЛ геомагнитным полем, связанное с изменениями энергетического спектра ССВ.&#13;
Данная работа посвящена изучению динамики энергетического спектра ССВ в циклах солнечной активности. Решение этой задачи представляет определенные сложности, связанные с особенностями наземной регистрации КЛ и чувствительностью детекторов к изменениям состояния окружающей среды. Для этого используется подход, основанный на применении скрещенных мюонных телескопов, позволяющий обойти эти сложности. С этой целью проводится анализ данных измерений мюонных телескопов «Якутск», «Нагоя», «Сао-Мартиньо» и «Хобарт» за 1972–2022 гг. Показано, что в минимумах солнечной активности в периоды положительной полярности общего магнитного поля Солнца наблюдается значительное смягчение спектра ССВ КЛ. Полученные результаты обсуждаются.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>The cosmic ray (CR) intensity recorded by ground-based detectors experiences solar diurnal variations (SDVs) associated with the existence of anisotropic angular distribution of CRs in near-Earth space. Long-term observations show that SDVs exhibit a dependence on the solar activity cycle, experiencing periodic 11- and 22-year variations. Such behavior of SDVs is linked to a change in the nature of galactic CR propagation in the heliosphere when it changes during a solar activity cycle. On the other hand, this phenomenon can be partially due to a change in the magnitude of CR drift by the geomagnetic field associated with changes in the SDV energy spectrum. &#13;
In this work, we determine the dynamics of the SDV energy spectrum in solar activity cycles. The solution to this problem presents certain difficulties associated with peculiarities of ground-based CR recording and with the sensitivity of CR detectors to changes in the state of environment. Therefore, we employ an approach using crossed muon telescopes to estimate it, which allows us to bypass the above difficulties. We analyze data from Yakutsk, Nagoya, Sao Martinho, and Hobart muon telescopes for 1972–2022. It is shown that at solar minima during periods of positive polarity of the Sun's general magnetic field, a significant softening of the spectrum is observed. The results are discussed.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>космические лучи</kwd>
    <kwd>солнечно-суточные вариации</kwd>
    <kwd>энергетический спектр</kwd>
    <kwd>мюонный телескоп.</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>cosmic rays</kwd>
    <kwd>solar diurnal variation</kwd>
    <kwd>energy spectrum</kwd>
    <kwd>muon telescope.</kwd>
   </kwd-group>
   <funding-group>
    <funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания Министерства науки и высшего образования Российской федерации (тема номер FWRS-2021-0012)</funding-statement>
    <funding-statement xml:lang="en">The work was carried out pursuant to Government assignment of the Ministry of Science and Higher Education of the Russian Federation (Theme No. FWRS-2021-0012)</funding-statement>
   </funding-group>
  </article-meta>
 </front>
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