Water drainage from Kushiro Coal Mine decreased on the day of all M ≥ 7.5 earthquakes and increased thereafter

Yoshiaki Fujii; Yoshihisa Ichihara; Hiroyuki Matsumoto; Jun-Ichi Kodama; Daisuke Fukuda; Anjula B N Dassanayake

doi:10.1038/s41598-018-34931-5

Water drainage from Kushiro Coal Mine decreased on the day of all M ≥ 7.5 earthquakes and increased thereafter

Sci Rep. 2018 Nov 7;8(1):16472. doi: 10.1038/s41598-018-34931-5.

Authors

Yoshiaki Fujii¹, Yoshihisa Ichihara², Hiroyuki Matsumoto², Jun-Ichi Kodama³, Daisuke Fukuda³, Anjula B N Dassanayake⁴

Affiliations

¹ Rock Mechanics Laboratory, Hokkaido University, N13W8, Sapporo, 060-8628, Japan. fujii6299@frontier.hokudai.ac.jp.
² Kushiro Coal Mine, 5-2-23, Okotsu, Kushiro, 085-0081, Japan.
³ Rock Mechanics Laboratory, Hokkaido University, N13W8, Sapporo, 060-8628, Japan.
⁴ Department of Earth Resources Engineering, University of Moratuwa, Moratuwa, 10400, Sri Lanka.

Abstract

The amount of water drainage from Kushiro Coal Mine in Hokkaido, Japan decreased on the day of all M ≥ 7.5 earthquakes with epicenters within 300 km of the mine during the monitoring period and increased after these earthquakes. This is a valuable finding which would give us a clue to understand pre- and post-seismic rockmass behaviors and contribute for progress in earthquake prediction in future.