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Alaska volcano goes quiet but remains ’restless,’ scientists say ’ 科學家：歸於平靜的阿拉斯加火山仍「不安分」

精英翻譯社轉自http://iservice.ltn.com.tw/Service/english/english.php?engno=979983&day=2016-04-17

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An Alaskan volcano that began erupting on March 27, belching an ash cloud 20,000 feet（6,906 meters）high that triggered aviation warnings, ended its latest round of seismic activity on April 9 but may not stay quiet for long, scientists said.

科學家指出，阿拉斯加一座於3月27日開始爆發的火山，噴發出高達兩萬英尺（約6906公尺）的火山塵雲，引發飛安警告；該火山雖已於4月9日結束最新一輪的地震活動，但可能不會長期保持寧靜。

Satellite observations showed no evidence of further "eruptive activity" on Mount Pavlof and low levels of seismic activity suggested that the volcano had subsided, the Alaska Volcano Observatory said in a statement.

「阿拉斯加火山觀測所（AVO）」聲明，根據衛星觀測，該火山並無進一步「噴發活動」的證據，低強度的地震活動亦顯示其已平靜下來。

But the mountain could stir again with little or no warning, the agency said, adding in a post on Twitter："The volcano remains restless and a return to robust eruptive activity is possible."

惟AVO聲明，該火山恐會在僅有一絲徵兆甚至無預警的情況下再次活動；AVO在《推特》寫道：「該火山依然不安分，有可能恢復猛烈的噴發活動。」

Pavlof, one of the most active volcanoes on the Alaska Peninsula, unleashed a towering plume of ash over its icy slopes drifting to the northwest. The Federal Aviation Administration issued a "red" aviation alert in response to the ash cloud, which required that local and regional flights, including cargo air traffic out of Anchorage, be re-routed. The alert level was dropped to yellow on April 9.

巴甫洛火山是阿拉斯加半島上最活躍的活火山之一，從冰坡上噴發出直衝雲霄的火山塵柱飄往西北方。有鑑於此，美國「聯邦航空總署」發布飛安「紅色」警戒，要求從阿拉斯加第一大城安克拉治起飛、包括貨機在內的當地及區域航班改道。4月9日該警報已降至黃色。

There have been more than 40 eruptions from Pavlof, including between May and November of 2014, when ash plumes also triggered aviation warnings. Such events can last weeks or months.

該火山迄今爆發逾40次，火山塵柱於2014年5月至11月期間亦曾引發飛安警告。這樣的火山活動可持續幾週或幾個月。