2013年6月2日台湾南投地震强地面运动模拟

Simulation of strong ground motion for the Nantou,Taiwan earthquake of 2 June 2013

2013年6月2日台湾省南投县发生一次里氏6.5级地震,这次地震是最近几年内发生的最大的一次地震,台湾大部分地区以及中国大陆东南沿海城市均有明显震感.为了更深入的理解此次地震的地震波能量传播过程以及强地面运动过程,本文采用三维有限差分方法对此次地震的强地面运动过程进行了模拟.结果显示,台湾中央山脉起伏的地形对此次地震的强地面运动分布特征具有较大的影响,出现了比较明显的地形放大效应;此外,台湾的平原和盆地中的沉积层也对地震波有较强的放大效应.

An earthquake of ML6. 5 hit Nantou County, Taiwan on 2 Jun 2 2013, which was the most significant one in recent years, and felt significantly by most areas of Taiwan and coastal cities of southeastern China's Mainland. In order to better understand the energy spread process of seismic waves and the character of strong ground motion caused by the earthquake, we simulate ground motion of this event with the 3D finite difference method. The results show that the characters of strong ground motion are dramatically influenced by the topography of the Central Mountains in Taiwan, with a clear topographic amplification effect. Besides, the sedimentary layers in the plains and basins have also amplified the seismic waves.