▁P over ty ▁Bay ▁on ▁ 2 6 ▁March ▁is ▁estimated ▁to ▁have ▁been ▁between ▁ 7 – 7 . 1 ▁, ▁and ▁generated ▁a ▁t sun ami ▁with ▁a ▁maximum ▁measured ▁run ▁up ▁height ▁of ▁ 1 0 ▁metres . ▁The ▁t sun ami ▁caused ▁w ides p read ▁damage ▁along ▁the ▁north - east ▁coast ▁of ▁the ▁North ▁Island , ▁but ▁was ▁not ▁observed ▁outside ▁of ▁New ▁Zealand . ▁Seven ▁weeks ▁later , ▁a ▁second ▁earth qu ake ▁struck ▁off sh ore ▁Tol aga ▁Bay ▁on ▁ 1 7 ▁May , ▁and ▁was ▁estimated ▁to ▁have ▁been ▁between ▁ 6 . 9 – 7 . 1 ▁. ▁It ▁also ▁generated ▁a ▁t sun ami , ▁with ▁a ▁maximum ▁measured ▁run ▁up ▁height ▁of ▁ 6 ▁metres . ▁Despite ▁occurr ing ▁at ▁low ▁t ide ▁and ▁being ▁less ▁powerful ▁the ▁second ▁time ▁around , ▁the ▁t sun ami ▁caused ▁small ▁amounts ▁of ▁damage ▁along ▁the ▁east ▁coast ▁and ▁is ▁noted ▁for ▁was hing ▁away ▁construction ▁materials ▁iron ically ▁being ▁used ▁to ▁repair ▁damage ▁from ▁the ▁previous ▁t sun ami . ▁ ▁No ▁one ▁died ▁in ▁either ▁of ▁the ▁ 1 9 4 7 ▁t sun am is , ▁but ▁the ▁to ll ▁could ▁have ▁been ▁high ▁had ▁they ▁struck ▁during ▁summer ▁hol id ays , ▁when ▁the ▁be aches ▁are ▁crow ded . ▁ ▁T ect onic ▁setting ▁New ▁Zealand ▁lies ▁along ▁the ▁boundary ▁between ▁the ▁Ind o - Austral ian ▁and ▁Pacific ▁Pl ates . ▁In ▁the ▁North ▁Island ▁the ▁disp