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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.



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.



"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。



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。



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

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※ 作者: STAV72 2024-05-11 14:08:49
※ 文章代碼(AID): #1cFmjr40 (Gossiping)
※ 文章網址: https://www.ptt.cc/bbs/Gossiping/M.1715407733.A.100.html