Posted on April 15, 2021 by Hokkaido NewsQuake info: Moderate mag. 4.5 earthquake – North Pacific Ocean, 35 km west of Muroran, Hokkaido, Japan, on Friday, 16 Apr 2021 5:47 am (GMT +9) – 1 user experience report – VolcanoDiscovery Quake info: Moderate mag. 4.5 earthquake – North Pacific Ocean, 35 km west of Muroran, Hokkaido, Japan, on Friday, 16 Apr 2021 5:47 am (GMT +9) – 1 user experience report VolcanoDiscovery