1. Earth Observatory of Singapore, Nanyang Technological University, N2‐01a‐14, 50 Nanyang Avenue, Singapore 639798, hantijun@googlemail.com
2. Earthquake‐Disaster & Risk Evaluation and Management (E‐DREaM) Center, National Central University, No. 300, Zhongda Road, Zhongli District, Taoyuan City 32001, Taiwan
3. Also at Department of Earth Sciences, National Central University, Taiwan.
4. Department of Nuclear Backend Management, Taiwan Power Company, No. 242, Section 3, Roosevelt Road, Zhongzheng District, Taipei City 10016, Taiwan