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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">103588</article-id>
   <article-id pub-id-type="doi">10.12737/szf-113202507</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">MHD waves in the pre-front region of the interplanetary shock on May 10, 2024</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>МГД-волны в области предфронта межпланетной ударной волны 10 мая 2024 г.</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/0000-0002-2343-1618</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Стародубцев</surname>
       <given-names>Сергей Анатольевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Starodubtsev</surname>
       <given-names>Sergei Anatolyevich</given-names>
      </name>
     </name-alternatives>
     <email>starodub@ikfia.ysn.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-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>
   <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>56</fpage>
   <lpage>64</lpage>
   <history>
    <date date-type="received" iso-8601-date="2025-02-28T00:00:00+03:00">
     <day>28</day>
     <month>02</month>
     <year>2025</year>
    </date>
    <date date-type="accepted" iso-8601-date="2025-05-22T00:00:00+03:00">
     <day>22</day>
     <month>05</month>
     <year>2025</year>
    </date>
   </history>
   <self-uri xlink:href="https://zh-szf.ru/en/nauka/article/103588/view">https://zh-szf.ru/en/nauka/article/103588/view</self-uri>
   <abstract xml:lang="ru">
    <p>Сообщается об изучении динамических изменений турбулентной составляющей ММП от спокойного периода 7 мая 2024 г. до момента прихода межпланетной ударной волны (МУВ) во второй половине 10 мая 2024 г. Для достижения поставленной цели к анализу привлечены одноминутные данные прямых измерений параметров межпланетной среды на космических аппаратах (КА) АСЕ, DSCOVR и WIND. Методами спектрального анализа изучается эволюция спектров мощности флуктуаций модуля ММП и МГД-волн на инерционном участке спектра турбулентных флуктуаций СВ на частотах ~2.5∙10–4–8.3∙10–3 Гц. Определен вклад альфвеновских, быстрых и медленных магнитозвуковых волн в наблюдаемый спектр мощности флуктуаций модуля ММП, измеряемого на каждом из трех КА, и установлены спектры мощности МГД-волн этих типов. Показано, что мощность спектров флуктуаций модуля ММП и МГД-волн более чем на порядок величины возрастает по мере приближения МУВ в точке ее регистрации на КА. Сделан вывод, что это является следствием генерации МГД-волн потоками штормовых частиц — космических лучей (КЛ) с энергиями ~1 МэВ, наблюдающихся в области перед фронтом МУВ. На основе анализа совокупности всех данных измерений сделано предположение, что значительный рост потоков КЛ низких энергий (~1 МэВ) и уровня турбулентности солнечного ветра может привести в изменению направления ММП в области, примыкающей к фронту МУВ.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>The article reports on the study of the dynamics of the IMF turbulent component from the quiet period on May 7, 2024 to the arrival of an interplanetary shock wave in the second half of May 10, 2024. To achieve the stated goal, 1-minute direct measurements of interplanetary medium parameters on the ACE, DSCOVR, and WIND spacecraft are involved in the analysis. Spectral analysis methods are used to study the evolution of power spectra of fluctuations in IMF modulus and MHD waves in the inertial portion of the SW turbulence spectrum at frequencies ~2.5∙10–4–8.3∙10–3 Hz. The contribution of Alfvén, fast, and slow magnetosonic waves to the observed power spectrum of the IMF modulus measured by each of the three spacecraft is determined, and power spectra of MHD waves of these types are identified. It is shown that the power of the spectra of fluctuations in the IMF modulus and MHD waves increases by more than an order of magnitude as the shock wave approaches the point of its recording on the spacecraft. It is concluded that this is due to the generation of MHD waves by fluxes of energetic storm particles (ESP) — cosmic rays with energies ~1 MeV, observed in the region ahead of the interplanetary shock wave front. Analysis of all measurement data allows for the assumption that a significant increase in low-energy CR fluxes (~1 MeV) and SW turbulence levels may lead to a change in the IMF direction in the region adjacent to the IPS front.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>МГД-волны</kwd>
    <kwd>солнечный ветер</kwd>
    <kwd>межпланетное магнитное поле</kwd>
    <kwd>межпланетная ударная волна</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>MHD waves</kwd>
    <kwd>solar wind</kwd>
    <kwd>interplanetary magnetic field</kwd>
    <kwd>interplanetary shock</kwd>
   </kwd-group>
   <funding-group>
    <funding-statement xml:lang="ru">Работа выполнена в рамках Государственного задания ИКФИА СО РАН FWRS-2021-0012</funding-statement>
    <funding-statement xml:lang="en">The work was carried out as part of the Government assignment from SHICRA SB RAS FWRS-2021-0012</funding-statement>
   </funding-group>
  </article-meta>
 </front>
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