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火山爆發前 會先發出「尖叫聲」
Jul 16th 2013, 16:07

【綜合報導】火山爆發前,其實會先發出猶如開水燒開的聲響,美國華盛頓大學分析阿拉斯加瑞道特火山(Redoubt Volcano)的爆發過程,發現爆發前會先有小型地震,接著出現聲響,地震頻率和幅度也越來越大,聲響從人耳聽不到的低頻逐漸變高頻,在火山爆發前聲音就突然停止。
 
因此研究人員認為透過監測火山周遭的地震,將可預測火山爆發,不過研究人員還無法判定是什麼造成地震和聲響。

阿拉斯加瑞道特火山。翻攝網路

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