原标题：美国阿拉斯加州以南海域发生7.8级地震，震源深度10千米
中国地震台网正式测定：07月22日14时12分在美国阿拉斯加州以南海域（北纬55.05度，西经158.50度）发生7.8级地震，震源深度10千米。
ink="%7B%22cover%22%3A%22%22%2C%22desc%22%3A%22QQ%E6%88%AA%E5%9B%BE20200722143516.png%22%2C%22id%22%3A%22fe1c70cf503499b22664a1de8fc52d82u1%22%2C%22size%22%3A47.31%2C%22width%22%3A579%2C%22height%22%3A308%2C%22url%22%3A%22https%3A%2F%2Frs1.huanqiucdn.cn/dp/api/images%2FimageDir%2Ffe1c70cf503499b22664a1de8fc52d82u1.png%22%2C%22tags%22%3A%5B%5D%2C%22time%22%3A%222020-07-22%2014%3A35%3A36%22%2C%22mime%22%3A%22image%2Fpng%22%7D" alt="美国阿拉斯加州以南海域发生7.8级地震，此处曾出现过世界第二大地震"/>
另据@中国地震台网速报，阿拉斯加位于环太平洋地震上，这里地震多发，每年都会有七级以上地震发生，其中1964年发生的9.2级地震是有记录以来全球第二大地震。
ink="%7B%22cover%22%3A%22%22%2C%22desc%22%3A%22QQ%E6%88%AA%E5%9B%BE20200722144905.png%22%2C%22id%22%3A%22ed094e76d6e01db3530851c0b14cefcau1%22%2C%22size%22%3A56.1%2C%22width%22%3A580%2C%22height%22%3A389%2C%22url%22%3A%22https%3A%2F%2Frs1.huanqiucdn.cn/dp/api/images%2FimageDir%2Fed094e76d6e01db3530851c0b14cefcau1.png%22%2C%22tags%22%3A%5B%5D%2C%22time%22%3A%222020-07-22%2014%3A49%3A31%22%2C%22mime%22%3A%22image%2Fpng%22%7D" alt="美国阿拉斯加州以南海域发生7.8级地震，此处曾出现过世界第二大地震"/>