https://blog.gongquiz.com/2022/01/13/%ed%95%b4%ec%96%91%ed%8c%90%ec%9d%b4-%eb%a7%a8%ed%8b%80%eb%a1%9c-%ed%95%98%ea%b0%95%ed%95%98%eb%8a%94-%ec%84%ad%ec%9e%85%eb%8c%80subduction-zone%ec%97%90%ec%84%9c-%ec%95%bd-700km-%ea%b9%8a%ec%9d%b4-2/