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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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">Izvestiya, Atmospheric and Oceanic Physics</journal-id><journal-title-group><journal-title xml:lang="en">Izvestiya, Atmospheric and Oceanic Physics</journal-title><trans-title-group xml:lang="ru"><trans-title>Известия РАН. Физика атмосферы и океана</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0002-3515</issn><issn publication-format="electronic">3034-6487</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">698992</article-id><article-id pub-id-type="doi">10.7868/S3034648725040031</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">ASSESSMENT OF THE AREA OF APPLICABILITY OF THE SHALLOW-WATER APPROXIMATION FOR REPRODUCING DISPERSIVE TSUNAMI WAVES</article-title><trans-title-group xml:lang="ru"><trans-title>ОЦЕНКА ОБЛАСТИ ПРИМЕНИМОСТИ ПРИБЛИЖЕНИЯ МЕЛКОЙ ВОДЫ ДЛЯ ВОСПРОИЗВЕДЕНИЯ ДИСПЕРГИРУЮЩИХ ВОЛН ЦУНАМИ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nosov</surname><given-names>M. A.</given-names></name><name xml:lang="ru"><surname>Носов</surname><given-names>М. А.</given-names></name></name-alternatives><email>m.a.nosov@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>Zarubina</surname><given-names>A. I.</given-names></name><name xml:lang="ru"><surname>Зарубина</surname><given-names>А. И.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kolesov</surname><given-names>S. V.</given-names></name><name xml:lang="ru"><surname>Колесов</surname><given-names>С. В.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет им. М.В. Ломоносова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Institute of Marine Geology and Geophysics, Far Eastern Branch of RAS</institution></aff><aff><institution xml:lang="ru">Институт морской геологии и геофизики Дальневосточного отделения РАН</institution></aff></aff-alternatives><content-language>ru</content-language><pub-date date-type="pub" publication-format="electronic" iso-8601-date="2025-08-15"><day>15</day><month>08</month><year>2025</year></pub-date><pub-date date-type="collection"><year>2025</year></pub-date><volume>61</volume><issue>4</issue><issue-title xml:lang="en">VOL 61, NO4 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 61, №4 (2025)</issue-title><fpage>442</fpage><lpage>456</lpage><history><date date-type="received" iso-8601-date="2025-12-21"><day>21</day><month>12</month><year>2025</year></date></history><pub-history><event event-type="received"><event-desc>Received:<date date-type="received" iso-8601-date="2025-12-21"><day>21</day><month>12</month><year>2025</year></date></event-desc></event><event event-type="pub"><event-desc>Published:<pub-date date-type="pub" publication-format="electronic" iso-8601-date="2025-08-15"><day>15</day><month>08</month><year>2025</year></pub-date></event-desc></event></pub-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/" start_date="2026-08-15"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/0002-3515/article/view/698992">https://journals.eco-vector.com/0002-3515/article/view/698992</self-uri><abstract xml:lang="en"><p>A practical method has been developed for determining the region of space in which the dispersionless shallow-water approximation is capable of reproducing dispersive tsunami waves with a given accuracy. We propose to evaluate the accuracy by the degree of delay of the dispersive wave packet relative to the front of long waves. The degree of delay is calculated along the wave rays emitted from the center of the source at different azimuth angles. The calculation of rays is implemented on a spherical surface taking into account the bottom relief, which is smoothed to meet the conditions of applicability of the ray theory. The dominant period of tsunami waves is calculated based on the shape of the initial elevation of the water surface in the source taking into account the distribution of ocean depths along each of the rays. The degree of delay of the dispersing wave packet is calculated based on the dominant period and the depth profile along the ray. The operation of the method is demonstrated using the example of two tsunami events on the Central Kuril Islands (Simushir tsunamis of 15.11.2006 and 13.01.2007).</p></abstract><trans-abstract xml:lang="ru"><p>Разработан практический метод определения области пространства, в которой бездисперсионное приближение мелкой воды способно воспроизводить диспергирующие волны цунами с заданной точностью. Оценивать точность мы предлагаем по степени запаздывания диспергирующего волнового пакета относительно фронта длинных волн. Степень запаздывания рассчитывается вдоль волновых лучей, испускаемых из центра источника под различными азимутальными углами. Расчет лучей реализован на сферической поверхности с учетом рельефа дна, который сглаживается для удовлетворения условиям применимости лучевой теории. По форме начального возвышения водной поверхности в источнике с учетом распределения глубин океана вдоль каждого из лучей рассчитывается доминирующий период волн цунами. По доминирующему периоду и профилю глубин вдоль луча вычисляется степень запаздывания диспергирующего волнового пакета. Работа метода продемонстрирована на примере двух цунами-событий на Центральных Курильских островах (Симуширские цунами 15.11.2006 и 13.01.2007).</p></trans-abstract><kwd-group xml:lang="en"><kwd>tsunami propagation</kwd><kwd>phase dispersion</kwd><kwd>long waves</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>распространение цунами</kwd><kwd>фазовая дисперсия</kwd><kwd>длинные волны</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено в рамках государственного задания МГУ им. М.В. Ломоносова.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Абдалазиз А., Диденкулова И.И., Дутых Д. Денисенко П. Сравнение дисперсионной и бездисперсионной моделей наката длинных волн на берег // Изв. РАН. Физика атмосферы и океана. 2020. Т. 56. № 5. 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