The waters mixed with loose material on the slopes of the mountain creating an enormous mudflow. In nine hours while no eye watched, the mudflow carved an integrated system of drainages over much of the valley and reopened the way to the Pacific Ocean. The drainages included at least three canyons 30m deep.
Maji yaliyochanganyika na taka nyepesi kwenye mwinamo wa mlima yalisababisha mtiririko wa tope.Katika masaa tisa pasipo jicho lililoona,tiririko la tope lilitia nakshi taratibu ya mifereji kwenye sehemu ya bonde na ikafungua njia ielekeayo kwa Ziwa la Pacific.Mifereji ilihusu mita 30 kwenda chini ya huku na huku kwa urefu.