emanation magma eruption 射气岩浆喷发
Renewed fears of an eruption came as vast quantities of magma - the molten rock from just under the earth's crust - began bubbling into the sea off the port of La Restinga.
在拉斯汀加港沿海，由于大量的岩浆——就在地表下的熔融的岩石——开始冒出来，引起了新的恐惧。
Reasons to worry: Merapi is capable of producing a Plinian eruption (spewing at least 1 cubic kilometer of magma and producing 20 to 50 kilometer-high ash columns)every 1,000 years or so.
列入关注的理由： 默拉皮火山属于普林尼式喷发，大约每千年大规模爆发一次（喷涌而出的岩浆总量可达1立方千米，漫天飞扬的火山灰足有20至50千米高）。
The caldera is about 6.5 kilometers [4 miles] across. It formed following an eruption, when the emptied magma chamber collapsed under the weight of volcanic rock above it.
这座单体火山拥有几乎是世界上最大的完整火山喷口，这个直径约为6.5公里（4英里）的锅型火山口，是当熔岩从火山内腔流过时，上部的岩浆岩坍塌而形成的。
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