Pedzisa mutsara unotevera: Gomba reJapan igomba romugungwa riri muPacific Ring of Fire riri kuchamhembe kwakadziva kumabvazuva kweJapan. Inotambanuka kubva kuzvitsuwa zveKuril kusvika kumugumo wokuchamhembe kwezvitsuwa zveIzu, uye yakadzika kwazvo. Iyo inobatanidza Kuril<unk>Kamchatka Trench kuchamhembe uye Izu<unk>Ogasawara Trench kumaodzanyemba kwayo nehurefu hwe. Gomba iri rinogadzirwa apo mahwendefa ePacific anopinda pasi peOkhotsk Plate (a microplate yaimbova chikamu cheNorth American Plate). Nzira yokudonha inokonzera kukotama kweplate iri kudzika, ichigadzira gomba rakadzika. Kufamba kunopfuurira munharaunda yokudonha kwakabatana neJapan Trench chimwe chezvinhu zvikuru zvinoparira tsunami nokudengenyeka kwenyika kuchamhembe kweJapan, kubatanidza megathrust
Kudengenyeka kwenyika kweTōhoku uye tsunami yakazoitika musi wa11 March 2011. Mwero wokudonha unobatanidzwa neJapan Trench wakanyorwa uri munenge pa1 /yr.