2017 Pohang earthquake , measuring magnitude 5.4 on the moment magnitude scale , struck Heunghae , Pohang , North Gyeongsang Province , South Korea on November 15 2017 . It is tied with the 2016 Gyeongju earthquake as the country 's strongest earthquake in modern history
2016 Gyeongju earthquake
2016 Gyeongju earthquake
2017 Pohang earthquake