▁coast ▁of ▁H ok ka ido , ▁Japan ▁on ▁March ▁ 7 ▁at ▁a ▁depth ▁of ▁ 3 0 . 0   km . ▁ ▁A ▁magnitude ▁ 6 . 9 ▁after sh ock ▁struck ▁off ▁the ▁south ▁coast ▁of ▁H ok ka ido , ▁Japan ▁on ▁March ▁ 9 ▁at ▁a ▁depth ▁of ▁ 4 9 . 5   km . ▁Se vent een ▁people ▁were ▁hurt ▁and ▁ 1 1 3 ▁homes ▁col lapsed . ▁ ▁A ▁magnitude ▁ 6 . 1 ▁earth qu ake ▁struck ▁sout heast ▁Al aska ▁on ▁March ▁ 9 ▁at ▁a ▁depth ▁ 1 0 . 0   km . ▁ ▁A ▁magnitude ▁ 6 . 5 ▁earth qu ake ▁struck ▁the ▁Ry uky u ▁Islands , ▁Japan ▁on ▁March ▁ 1 3 ▁at ▁a ▁depth ▁of ▁ 2 8 0 . 8   km . ▁ ▁A ▁magnitude ▁ 6 . 1 ▁after sh ock ▁struck ▁off ▁the ▁sout heast ▁coast ▁of ▁H ok ka ido , ▁Japan ▁on ▁March ▁ 1 4 ▁at ▁a ▁depth ▁of ▁ 4 0 . 9   km . ▁ ▁A ▁magnitude ▁ 6 . 3 ▁earth qu ake ▁struck ▁southern ▁Sum atra , ▁Indones ia ▁on ▁March ▁ 1 5 ▁at ▁a ▁depth ▁of ▁ 1 5 . 0   km . ▁ ▁A ▁magnitude ▁ 6 . 3 ▁earth qu ake ▁struck ▁Py ong y ang , ▁North ▁Korea ▁on ▁March ▁ 1 9 ▁at ▁a ▁depth ▁of ▁ 3 5 . 0   km . ▁This