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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">Journal of Volcanology and Seismology</journal-id><journal-title-group><journal-title xml:lang="en">Journal of Volcanology and Seismology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вулканология и сейсмология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0203-0306</issn><issn publication-format="electronic">3034-5138</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">689676</article-id><article-id pub-id-type="doi">10.31857/S0203030625030015</article-id><article-id pub-id-type="edn">PYQCKP</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">Dynamics of eruptions of Grot geyser (Valley of Geysers, Kamchatka) in 2024</article-title><trans-title-group xml:lang="ru"><trans-title>Динамика извержений гейзера Грот (Долина гейзеров, Камчатка) в 2024 году</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kiryukhin</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Кирюхин</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>AVKiryukhin2@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nesterenko</surname><given-names>M. Y.</given-names></name><name xml:lang="ru"><surname>Нестеренко</surname><given-names>М. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>AVKiryukhin2@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Usacheva</surname><given-names>O. O.</given-names></name><name xml:lang="ru"><surname>Усачева</surname><given-names>О. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>AVKiryukhin2@mail.ru</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Volcanology and Seismology FEB RAS</institution></aff><aff><institution xml:lang="ru">Институт вулканологии и сейсмологии ДВО РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Kronotsky Federal Nature Biosphere Reserve</institution></aff><aff><institution xml:lang="ru">Кроноцкий Государственный Биосферный Заповедник</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Institute of Volcanology and Seismology FEB RAS</institution></aff><aff><institution xml:lang="ru">Институт вулканологии и сейсмологии ДВО РАН, бульвар Пийпа</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-05-15" publication-format="electronic"><day>15</day><month>05</month><year>2025</year></pub-date><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>3</fpage><lpage>11</lpage><history><date date-type="received" iso-8601-date="2025-08-21"><day>21</day><month>08</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-08-21"><day>21</day><month>08</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><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://journals.eco-vector.com/0203-0306/article/view/689676">https://journals.eco-vector.com/0203-0306/article/view/689676</self-uri><abstract xml:lang="en"><p>The paper presents the results of visual and instrumental observations of eruptions of the Grot geyser carried out in 2024 in the Valley of Geysers (Kamchatka). It was found that the eruption regime of Grot Geyser has changed significantly: Grot Geyser has turned from an irregularly erupting geyser into a relatively regular geyser with an interval between eruptions of 10.4 hours in the winter low season, a break during the most intense flood, and subsequent resumption of geyser activity with an interval of 24 hours. The eruption volume of Grot geyser is estimated at ≈70 m<sup>3</sup> using the chloride-tracer method.</p></abstract><trans-abstract xml:lang="ru"><p>Представлены результаты визуальных и инструментальных наблюдений за извержениями гейзера Грот, проведенных в 2024 г. в Долине гейзеров (Камчатка). Установлено, что режим извержений гейзера Грот существенно изменился: Грот из нерегулярно извергающегося гейзера превратился в относительно регулярный гейзер со интервалом между извержениями 10.4 часа в зимнюю межень, перерывом на время наиболее интенсивного паводка, и последующим возобновлением гейзерной деятельности с интервалом 24 часа. Объем извержения гейзера Грот оценивается ≈70 м<sup>3</sup> с использованием хлоридно-трассерного метода.</p></trans-abstract><kwd-group xml:lang="en"><kwd>geyser</kwd><kwd>chloride-tracer method</kwd><kwd>Grot</kwd><kwd>infiltration</kwd><kwd>IBE</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гейзер</kwd><kwd>хлоридно-трассерный метод</kwd><kwd>Грот</kwd><kwd>инфильтрация</kwd><kwd>IBE</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Правительство РФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">Government of RF</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Кирюхин А.В. 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