The seafloor around the Hawaiian islands are littered with the remains of massive ancient landslides that produce tsunamis.
it is thought that these gigantic landslides might have produced Iminami’s ; super size locally generated wash backs caused by such collapses . The displaced ocean surge back to the shore and has left traces of marine debris to over 1000 ft. in elevation . A space object hit in the ocean would also produce such an iminami .