Typical of Tsunami Hazard Potential from Earthquake and Landslide Sources in Palabuhanratu Bay, Indonesia

IF 1.9 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

pure and applied geophysics Pub Date : 2024-04-23 DOI:10.1007/s00024-024-03483-3

Wiko Setyonegoro, Aditya Riadi Gusman, Muhammad Hanif, Telly Kurniawan, Sri Ardhyastuti, Muhamad Mahfud Muqoddas, Mamoru Nakamura, Purna Sulastya Putra, Semeidi Husrin, Nuraini Rahma Hanifa, Septriono Hari Nugroho, Evie Hadrijantie Sudjono, Titi Anggono, Febty Febriani, Pepen Supendi, Mohamad Ramdhan, Agustya Adi Martha, Adrin Tohari, Iyan Turyana

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引用次数: 0

Abstract

Traces of past landslides were found on the seabed of Palabuhanratu Bay, West Java. This landslide is thought to have generated a tsunami, but has never been investigated before. This bay is located around the western part of the Cimandiri Fault which is an active horizontal fault with a length of 100 km. Therefore, it is necessary to study the potential impact of a tsunami in the Palabuhanratu Bay area caused by a combination of local earthquakes and underwater landslides around the bay. Evidence of past landslides was revealed through side-scan sonar data from the underwater research vessel Baruna Jaya IV in Palabuhanratu Bay, Indonesia, in 2020. The data from this survey provides evidence of debris flows (historical landslide data) at the survey site. We simulated 29 tsunami scenarios from combined landslide earthquake sources by solving shallow water nonlinear equations numerically. Tsunami sources from earthquakes are classified into three types, e.g., land faults, sea faults, and combinations of land and sea faults. While the source of the tsunami from the landslide is divided by volume. Combination of the earthquake magnitudes range from M6.80 to M7.85, and the landslide volume ranged from 3.06 × 10⁵ m³ to 2.5 × 10⁸ m³. This study concludes that in our scenario, the M8.12 type T7 earthquake generates the largest tsunami in the study area, followed by the T6L5 scenario with M7.85 from the Cimandiri Fault and landslide with a total volume of 2.5 × 10⁸ m³.

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印度尼西亚帕拉布汉拉图湾地震和山体滑坡源海啸潜在危害的典型情况

在西爪哇帕拉布汉拉图湾的海底发现了过去山体滑坡的痕迹。这种滑坡被认为曾引发海啸，但以前从未进行过调查。该海湾位于西曼迪里断层（Cimandiri Fault）的西部，而西曼迪里断层是一个活跃的水平断层，长度达 100 公里。因此，有必要对帕拉布汉拉图海湾地区由当地地震和海湾周围水下滑坡共同引发的海啸的潜在影响进行研究。2020 年，水下研究船 "Baruna Jaya IV 号 "在印度尼西亚帕拉布汉拉图海湾的侧扫声纳数据揭示了过去山体滑坡的证据。这次调查的数据提供了调查地点泥石流（历史滑坡数据）的证据。我们通过数值求解浅水非线性方程，模拟了 29 个滑坡地震综合海啸源情景。地震海啸源分为三种类型，如陆地断层、海洋断层以及陆地和海洋断层的组合。而滑坡产生的海啸源则按体积划分。地震震级组合从 M6.80 到 M7.85，滑坡体积从 3.06 × 105 立方米到 2.5 × 108 立方米不等。这项研究得出结论，在我们的假设情况下，M8.12 型 T7 地震在研究地区产生的海啸最大，其次是 T6L5 假设情况，来自 Cimandiri 断层的 M7.85 和山体滑坡的总体积为 2.5 × 108 立方米。

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来源期刊

pure and applied geophysics 地学-地球化学与地球物理

CiteScore

4.20

自引率

5.00%

发文量

240

审稿时长

9.8 months

期刊介绍： pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.