"세 차례 화산 폭발"...성산일출봉 탄생 비밀 벗기다 / YTN YTN 0 15 10.19 23:53 https://www.youtube.com/watch?v=DpaltIfRA5w + 2 https://www.youtube.com/feeds/videos.xml?channel_id=UChlgI3UHCOnwUGzWz… + 1 "세 차례 화산 폭발"...성산일출봉 탄생 비밀 벗기다 / YTN