[新聞] 歐洲出現遠離現有斷層與火山的異常地震

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備註請放最後面違者新聞文章刪除 1.媒體來源: 外媒 livescience.com 2.記者署名: By Stephanie Pappas 3.完整新聞標題: Odd earthquake swarm in Central Europe hints at magma bubbling below the surface 中歐奇怪的地震群暗示岩漿在地表下沸騰翻滾 4.完整新聞內文: Odd earthquake swarm in Central Europe hints at magma bubbling below the surface News By Stephanie Pappas published 11 hours ago An odd earthquake swarm has struck the region between the Czech Republic and Germany, far from any tectonic plate boundary. A photograph of an autumn sunset from Barenstein hill above Plauen city in Germany Though it's nowhere near a tectonic plate boundary, the Vogtland region is known for its earthquake swarms. (Image credit: honza28683 via Getty Images) An odd earthquake swarm on the border of Germany and the Czech Republic may hint at magma moving deep below the surface. 中歐奇怪的地震群暗示岩漿在地表下沸騰翻滾史蒂芬妮·帕帕斯發表11 小時前一場奇怪的地震群襲擊了捷克共和國和德國之間遠離任何板塊邊界的地區。儘管沃格特蘭地區遠離板塊邊界，但它卻以其地震群而聞名。德國和捷克共和國邊境發生的一場奇怪的地震群可能暗示岩漿正在地表深處移動。 The quakes are in Vogtland, a region known for regular, low-level earthquake swarms. These swarms tend to last several weeks and lead to mostly mild shaking. The largest known quakes from the area are around magnitude 4.5, said Torsten Dahm, a geophysicist at the GFZ German Research Centre for Geosciences who's leading a project monitoring this region. 地震發生在沃格特蘭，該地區以經常發生低強度地震群而聞名。這些群體往往會持續數週，並導致大多輕微的震動。 GFZ 德國地球科學研究中心的地球物理學家Torsten Dahm表示，該地區已知的最大地震規模約為 4.5 ，他領導了一個監測該地區的計畫。 Dahm and his colleagues recently finished deploying a new network of seismometers installed in boreholes in the Vogtland area. These seismometers captured a late-March earthquake swarm unlike others seen in the area — the center of the swarm jumped 9 miles (15 kilometers) to the north, compared with previous swarms. And instead of occurring on a vertical fault line underground, it seems to have taken place on a near-horizontal underground structure. 達姆和他的同事最近完成了安裝在沃格特蘭地區鑽孔中的新地震儀網路的部署。這些地震儀捕捉了 3 月下旬的地震群，與該地區其他地震群不同的是，與先前的地震群相比，地震群中心向北跳躍了 9 英里（15 公里）。而且它似乎不是發生在地下垂直斷層線上，而是發生在接近水平的地下結構上。 "For us it was a bit of a new observation and a little bit of a surprise," Dahm told Live Science. This indicates a complex seismic situation under this picturesque region of rolling hills and green meadows. Vogtland is far from the edges of tectonic plates. The details of why there are earthquakes in the area are still unclear, Dahm said, but most likely, they are the result of carbon dioxide bubbling up from magmatic fluids some 30 miles (50 km) deep. There are no active volcanoes in the area, and there's very little evidence of ancient volcanic activity, Dahm said. 「對我們來說，這是一個新的觀察，也有點驚喜，」達姆告訴《生活科學》。這顯示在這片風景如畫、起伏的丘陵和綠色草地下的地震情況非常複雜。沃格特蘭遠離板塊邊緣。達姆說，該地區發生地震的細節尚不清楚，但很可能是二氧化碳從約 30 英里（50 公里）深的岩漿液中冒出的結果。達姆說，該地區沒有活火山，也幾乎沒有古代火山活動的證據。 One major question the research team has is whether melty magma itself actually comes out of the mantle and into the crust under this region, or whether the quakes are caused by fluids and gases produced by the magma. Compressional forces in the crust would likely keep these magmas from erupting, Dahm said, but they might accumulate in the crust over time. If so, this would have implications for the evolution of new volcanoes over tens of thousands or hundreds of thousands of years. In other words, volcanoes could one day erupt in this currently peaceful region if the magmas accumulate. Or the magmas might simply remain below the surface, never causing more than small temblors.. 研究小組面臨的一個主要問題是，融化的岩漿本身是否真的從地函中流出並進入該區域下的地殼，或者地震是否是由岩漿產生的流體和氣體引起的。達姆說，地殼中的壓縮力可能會阻止這些岩漿噴發，但隨著時間的推移，它們可能會在地殼中積聚。如果是這樣，這將對新火山數萬年或數十萬年的演化產生影響。換句話說，如果岩漿積聚，有一天火山可能會在這個目前和平的地區爆發。或者岩漿可能只是停留在地表下，只會造成小規模的地震。 The findings also may have implications for seismic activity in other regions where volcanic activity is possible. "There is a good opportunity now with these very precise observations of seismicity to possibly better answer the question, what really causes the earthquake swarms?" Dahm said. 這些發現也可能對其他可能發生火山活動的地區的地震活動產生影響。 “現在有一個很好的機會，透過這些非常精確的地震活動觀測，可以更好地回答這個問題，到底是什麼導致了地震群？”達姆說。 5.完整新聞連結 (或短網址)不可用YAHOO、LINE、MSN等轉載媒體: https://reurl.cc/NQyGzq 6.備註: 德國終於要物理脫歐了 -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 1.34.17.2 (臺灣) ※ 文章網址: https://www.ptt.cc/bbs/Gossiping/M.1715407733.A.100.html

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