Ачех – одна из индонезийских провинций, подверженных землетрясениям, поскольку ее пересекают Большой Суматрский разлом и зоны субдукции вдоль западного побережья с высокой сейсмической активностью. В последнее время исследования по картированию разломов были сосредоточены на сегментах Ачех и Сеулимум в западной части провинции Ачех. В отличие от этого, центральная часть еще не изучена, несмотря на то, что за последние 10 лет произошло несколько землетрясений в районах, где трассы разломов все еще нуждаются в надлежащем картировании. Поэтому в данном исследовании использовалась глобальная гравитационная модель Plus (GGM+) с высоким разрешением 200 м/пкс для анализа взаимосвязи между сейсмичностью и структурами разломов в центральной части Ачеха. Остаточная аномалия GGM+ указывает на существование геологических структур, таких как сегменты Ачех, Памеу и Самаланга, характеризующихся низкой гравитацией. Для уточнения наличия разломов также применялись некоторые производные методы, например, горизонтальная производная аномалия для картирования сегментов Ачех, Бати, Самаланга и Алуэ Линтанг - Пеусанган. Вертикальная производная показывает существование разлома Тринггаденг, предположительно являющегося источником землетрясения Пиди Джая в 2016 году. Таким образом, производная наклона может также визуализировать наличие разлома Ниссам, что не отображается в других методах фильтрации. Мы также провели 3D гравитационное моделирование с использованием алгоритма Occam и сингулярного разложения; плотность указывает на глубину и геометрию структуры разлома, в целом 8 км, что обеспечивает надежность GGM+ при изучении разломов, особенно в высокогорных районах, где использование приборов затруднено.

Ключевые слова: Гравитация, разлом, GGM +, провинция Ачех, геологическое строение, 3D инверсия

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