Funding for this research was provided by:
Tohoku University Division for Interdisciplinary Advanced Research and Education
Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan under its Earthquake and Volcano Hazards Observation and Research Program
Article History
Received: 23 January 2017
Accepted: 16 August 2018
First Online: 29 August 2018
Competing Interests
: The authors declare no competing interests.