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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Geomagnetism and Aeronomy</journal-id><journal-title-group><journal-title xml:lang="en">Geomagnetism and Aeronomy</journal-title><trans-title-group xml:lang="ru"><trans-title>Геомагнетизм и аэрономия</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0016-7940</issn><issn publication-format="electronic">3034-5022</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">684621</article-id><article-id pub-id-type="doi">10.31857/S0016794025010092</article-id><article-id pub-id-type="edn">ADQVRU</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Specific features of ionospheric disturbances accompanying the 14–20 January 2022 magnetic storm</article-title><trans-title-group xml:lang="ru"><trans-title>Особенности ионосферных возмущений, сопровождавших магнитную бурю 14–20 января 2022 г.</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kurkin</surname><given-names>V. I.</given-names></name><name xml:lang="ru"><surname>Куркин</surname><given-names>В. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vikurkin@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zolotukhina</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Золотухина</surname><given-names>Н. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>zolot@iszf.irk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ponomarchuk</surname><given-names>S. N.</given-names></name><name xml:lang="ru"><surname>Пономарчук</surname><given-names>С. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>spon@iszf.irk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Oinats</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Ойнац</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>oinats@iszf.irk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ratovsky</surname><given-names>K. G.</given-names></name><name xml:lang="ru"><surname>Ратовский</surname><given-names>К. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ratovsky@iszf.irk.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Solar-Terrestrial Physics of Siberian Branch of Russian Academy of Sciences (ISTP SB RAS)</institution></aff><aff><institution xml:lang="ru">Институт солнечно-земной физики СО РАН (ИСЗФ СО РАН)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-01-15" publication-format="electronic"><day>15</day><month>01</month><year>2025</year></pub-date><volume>65</volume><issue>1</issue><fpage>103</fpage><lpage>117</lpage><history><date date-type="received" iso-8601-date="2025-06-16"><day>16</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0016-7940/article/view/684621">https://journals.eco-vector.com/0016-7940/article/view/684621</self-uri><abstract xml:lang="en"><p>We conducted the analysis of ionospheric disturbances that occurred during the moderate magnetic storm of 14–20 January 2022. The study is based on data of vertical and oblique ionospheric sounding obtained in the Northeastern region of Russia, and supplemented by observations at HF radars and magnetic observatories. It has been revealed that the amplitudes of positive and negative ionospheric disturbances accompanying this storm are comparable to those observed on other days of January during weak magnetic storms and disturbances. Specific features of the disturbances observed only during the storm in question are as follows: (1) a midnight–morning increase of the maximum observed frequency of one-hop mode of HF radio wave propagation on the paths Norilsk — Tory and Magadan — Tory on 14 January; (2) enhanced nighttime fluctuations in <italic>F</italic>2-layer critical frequency in Irkutsk and the maximum observed frequency of one-hop mode on the path Magadan — Tory on 15 January; (3) Morning–midday <italic>Es</italic> layers with limiting frequencies reaching 7 MHz that were observed in mid-latitudes at the end of the first and beginning of the second day of the storm recovery phase.</p></abstract><trans-abstract xml:lang="ru"><p>Проведен анализ ионосферных возмущений, сопровождавших умеренную магнитную бурю 14–20 января 2022 г. Работа основана на данных вертикального и наклонного зондирования ионосферы, полученных в Северо-Восточном регионе России, дополненных наблюдениями КВ-радаров и магнитных обсерваторий. Выявлено, что амплитуды положительных и отрицательных ионосферных возмущений, сопровождавших данную бурю, сравнимы с возмущениями, которые наблюдались в другие дни января во время слабых магнитных бурь и возмущений. Специфическими особенностями возмущений, наблюдавшимися только в ходе исследуемой бури, являются: (1) полуночно-утреннее увеличение максимальной наблюдаемой частоты односкачкового мода распространения КВ-радиоволн на трассах Норильск–Торы и Магадан–Торы 14 января; (2) ночные усиления флуктуаций критической частоты <italic>F</italic>2-слоя в Иркутске и максимальной наблюдаемой частоты односкачкового мода на трассе Магадан–Торы 15 января; (3) утренне-полуденные <italic>Es</italic>-слои с предельными частотами, достигавшими 7 МГц, наблюдавшиеся на средних широтах в конце первого и начале второго дня восстановительной фазы бури.</p></trans-abstract><kwd-group xml:lang="en"><kwd>magnetic storm</kwd><kwd>ionospheric sounding</kwd><kwd>ionospheric disturbances</kwd><kwd>radio wave propagation</kwd><kwd>maximal observed frequency</kwd><kwd>F2-layer critical frequency</kwd><kwd>main ionospheric trough</kwd><kwd>diffuse electron precipitation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>магнитная буря</kwd><kwd>зондирование ионосферы</kwd><kwd>ионосферные возмущения</kwd><kwd>распространение радиоволн</kwd><kwd>максимальная наблюдаемая частота</kwd><kwd>критическая частота F2-слоя</kwd><kwd>главный ионосферный провал</kwd><kwd>диффузные высыпания электронов</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство образования науки</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Education and Science</institution></institution-wrap></funding-source><award-id>075-ГЗ/Ц3569/278</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Данилов А.Д. 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