Mario A Aurelio¹, John Agustin Escudero², Ying-Hui Yang³, Jyr-Ching Hu⁴ and Iris Yvette A Cesista¹, (1)National Institute of Geological Sciences, University of the Philippines, Quezon City, Philippines, (2)University of the Philippines, Diliman, National Institute of Geological Sciences, Quezon, Philippines, (3)Southwest Petroleum University, School of Civil Engineering and Architecture, Chengdu, China, (4)National Taiwan University, Department of Geosciences, Taipei, Taiwan