星期三 2025年 11月 12日
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火山爆发致一岛沉没  大3倍新岛形成

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卫星图显示原先的拉德基岛(左图红方框)在火山爆发后沉没,其后形成一个更大的新岛屿(右图白圈)。

太平洋岛国汤加的土地、调查及自然资源部周四(7日)发表报告,指当地的海底火山在上月爆发,导致一个岛屿下沉,惟火山喷出的溶岩却形成另一个比原先小岛大3倍的新岛屿。

卫星图显示拉德基岛爆发时冒出滚滚浓烟。(互联网)

地质学家库拉(Taaniela Kula)在报告中指,位于北部哈派群岛(Ha’apai Islands)的拉德基岛(Lateiki Island ),上月13日至31日期间火山爆发及引发地震,导致拉德基岛沉没。

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原来的拉德基岛亦是因火山爆发形成。(互联网)

惟之后在拉德基岛原本位置西面约120米处,冒出一个长约400米、阔约100米的新岛屿。

拉德基岛又名墨提斯岛(Metis Shoal),于1995年一次海底火山爆发后形成,之后曾多次爆发。

报告指拉德基岛虽已沉下海底和停止爆发,惟仍然释出硫磺、二氧化碳及硫化氢等气体,或会令海水变色,有潜在危险。

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