班达亚齐的苏门答腊-安达曼海啸:线性表征模型

Jorge Corrêa de Araújo, Rosa García Márquez
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引用次数: 0

摘要

2004 年 12 月 26 日发生的苏门答腊-安达曼地震是过去 40 年中的第二大地震,震级为 9.1 - 9.3 级。断裂发生在印度板块和缅甸板块之间一个大型边界断层的 1.3 千米深处。在苏门答腊岛班达亚齐附近,断层滑移达 20 米,与印度板块和安达曼群岛之间的北端相比,速度更快,后者的滑坡从 7 米到 20 米需要近一个小时。根据这些数据和其他观察结果,可以估计主要海啸起源于距离班达亚齐市约 390 公里的地方。虽然本研究采用的简谐波传播的能量比其他参考文献报道的要短,但仍然很重要。使用简单模型估算的海啸到达班达亚齐的时间与实际观测时间相当吻合。这种一致性表明,本研究估计的海啸起源区域很可能在海啸最可能的起点范围内。模型估算的海岸附近的波幅在参考文献报告的观测范围之内。本研究开发的方法似乎适合于对此类事件中的几个重要参数进行初步估算。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Sumatra-Andaman Tsunami in Banda Aceh: A Linear Model for Representation
The Sumatra-Andaman earthquake that occurred on December 26, 2004 was the second largest earthquake in the past 40 years, with a moment magnitude of 9.1 - 9.3. The rupture took place at a depth of 1.3 km along a large boundary fault between the Indian and Burma plates. The fault slip reached up to 20 meters near Banda Aceh, Sumatra Island, and was more rapid compared to the northern end between the Indian Plate and the Andaman archipelago, where landslide took almost one hour to reach from 7 to 20 meters. Based on this data and other observations, it was possible to estimate that the main tsunami originated approximately 390 km from Banda Aceh city. Although the energy transmitted by the simple harmonic waves adopted in this study was shorter than that reported by other references, it was still significant. The estimated arrival time for the tsunami in Banda Aceh using a simple model was reasonably consistent with the actual observation time. This agreement suggests that the origin region of the estimated in this study is likely within the most probable starting point of the tsunami. The wave amplitude near the coast, as estimated by the model, fell within the observed range reported by the references. The methodology developed in this study seems to be suitable for obtaining initial estimates of several important parameters involved in events of this nature.
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