gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2026-17-1-0877RTCLYXgtcrust-2209Research ArticleСОВРЕМЕННАЯ ГЕОДИНАМИКАRECENT GEODYNAMICSОПРЕДЕЛЕНИЕ ШКАЛЫ ЛОКАЛЬНЫХ МАГНИТУД (ML) ДЛЯ МОНГОЛИИDETERMINATION OF THE LOCAL MAGNITUDE SCALE (ML) FOR MONGOLIAhttps://orcid.org/0000-0002-4715-2824ГанбатБ.GanbatB.

13343, Улан-­Батор 

Ulaanbaatar 13343 

baigalaa@iag.ac.mnhttps://orcid.org/0000-0001-7801-3360МонхооУ.MunkhuuU.

13343, Улан-­Батор 

Ulaanbaatar 13343 

Институт астрономии и геофизики МАНМонголияInstitute of Astronomy and Geophysics, Mongolian Academy of SciencesMongolia202617022026171877877Copyright © Ганбат Б., Монхоо У., 20262026Ганбат Б., Монхоо У.Ganbat B., Munkhuu U.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/2209

Корректировка шкалы локальных магнитуд с учетом региональных тектонических характеристик имеет решающее значение для расширения исследований, направленных на оценку сейсмического риска и измерение сейсмической активности в геодинамических зонах. В данном исследовании разработана шкала локальных магнитуд для территории Монголии. Проанализировано 261 землетрясение с магнитудой ˃3.5 и эпицентральным расстоянием до 1000 км из монгольского каталога за период с 2012 по 2019 г., зарегистрированное как минимум пятью широкополосными станциями. Собранные данные включают в себя 8616 измерений пиковой амплитуды в горизонтальной плоскости, полученных со 144 широкополосных станций.

Проведен детальный линейный регрессионный анализ для определения формулы локальной магнитуды в соответствии с рекомендациями Международной ассоциации сейсмологии и физики недр Земли. В результате новая формула локальной магнитуды выглядит следующим образом: ML=log10(A)+0.9287log10(R)+0.0012R–1.66. Кроме того, были определены поправочные коэффициенты S для каждой станции.

Adjusting the local magnitude scale to match the regional tectonic characteristics is crucial to enhance studies focused on evaluating seismic risk and measuring seismic activity in geologically dynamic zones. In this study, we developed a local magnitude scale for Mongolia. Using the Mongolia earthquake catalog for the period from 2012 to 2019, we analyzed 261 earthquakes with magnitudes ˃3.5 that occurred within a 1000 km epicentral distance and were recorded by at least five broadband stations. The compiled data set includes 8616 horizontal peak amplitude measurements from 144 broadband stations.

We performed a detailed linear regression analysis to develop the local magnitude formula in accordance with the guidelines of the International Association of Seismology and Physics of the Earth’s Interior. As a result, the new local magnitude formula is expressed as: ML=log10(A)+0.9287log10(R)+0.0012R−1.66. In addition, we determined the correction factors S for each station.

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The authors declare that there are no conflicts of interest present.