[S07-P] Poster

[S07-P-04] Nonlinear Site Response During the 2016 Meinong, Taiwan Earthquake

^○Kuo-Liang Wen¹, Chun-Te Chen², Shun-Chiang Chang¹ (1.Department of Earth Sciences, National Central University, Taoyuan, Taiwan, 2.Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan)

The Meinong earthquake occurred on February 6, 2016, at 03:57 (UTC+8) with ML 6.6. The epicenter was located in the Meinong district of Kaohsiung City, Taiwan, however, the highest intensity appears in the Tainan City. The strong ground motion induced soil liquefaction in the Sinshih and Annan districts of Tainan City. To investigate the nonlinear site response during Meinong mainshock, the degree of nonlinear site response (DNL) which summation of the horizontal to vertical spectral ratios (HVSR) differences between weak-motions and Meinong mainshock records from the TSMIP network is calculated. We compare the DNL values with the ground motion parameters such as PGA, PGV and also the ratio between PGV and VS30. The DNL show a positive correlation with ground motion intensity, particular with PGV, and the surface site conditions also leading the DNL strength. The areas that have high DNL values are consistent with the high potential liquefaction map that published by the Central Geological Survey, Taiwan.