像宽干谷这样爆裂的火山口形成于蒸汽喷发的过程中，在那里，上升的岩浆与地表下的水接触形成了蒸汽喷发。
Volcanic explosion craters such as Dallol form during phreatic eruptions—where rising magma comes into contact with water beneath the surface of the Earth, causing a steam explosion.
岩浆能喷发出地表，并通过火山峰顶形成熔岩流(大多情况会形成火山口)，但它也能通过火山山体侧面的火山岩圆顶和侧面出口喷发出来。
Magma can erupt to the surface and form lava flows through the volcano's summit (frequently forming a crater), but it can also erupt from lava domes and flank vents along the volcano's sides.
火山顶部的冰川融水流进了火山口，冷却了岩浆，随后来自底部的压力造成了爆炸。
The meltwater from the glacier on top of the volcano ran down into the crater, chilling the magma and then the pressure from underneath caused an explosion.
站在火山口的地表上，他根本看不到岩浆湖，因为位于锥形冷却熔岩的岩浆湖在他的视线之上。
Standing on the crater floor, he couldn't see the lake itself, which was above him within the cone of cooled lava.
据火山观测站所说，到周日为止，在火山口内，偶尔的岩石小瀑布——而不是岩浆流动——是火山还在活动的唯一迹象。
As of Sunday, occasional rock cascades were the only signs of activity-other than lava flows-within the crater, according to the volcano observatory.
冰岛气象局声称，今天早些时候，地震震动预示着岩浆已经开始从火山口中喷涌而出。
Early in the day, seismic tremors hinted that lava might have started flowing from the volcano, said the Icelandic Met Office.
探险队的一位队员行走在火山口已经冷却的岩浆层上，岩浆层因为反射熔岩湖的火光而呈现出红色。
A member of the expedition walks on the caldera's cooled lava floor, turned red by the reflected glow of the lake.
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。
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.
今天上午十点半当冰岛海岸警卫队的飞机飞过火山口附近时，他们观察到岩浆正在喷涌，达到1.5到3千米(0.93到1.9英里)，虽然还没有火山熔岩飘在空气中。
When the Icelandic Coast Guard flew over the volcano at 10:30, they observed magma being thrown 1.5-3 kilometers (0.93-1.9 miles) into the air, though no lava was flowing.
其他两人攀下火山口去收集供日后研究用的岩浆，但这是我第一次经历，我呆在顶部，看着他们。
The other two climbed down into the crater to collect some lava for later study, but this being my first experience, I stayed at the top and watched them.
另外两人攀下火山口去收集供日后研究用的岩浆，我是第二次经历这样的事，所以留在山顶上观察他们。
The other two climbed down into the crater to collect some lava for later study, but this being my first experience, I stayed at the top and watched them.
另外两人爬下火山口去收集供日后研究用的岩浆，我是第一次经历这样的事，所以留在山顶上观察他们。 。
Thee other two climbed down into the crater to collect some lava for later study, but this being my first experience, _I stayed at the top and watched them.
另外两人攀下火山口去收集供日后研究用的岩浆，我是第一次经历这样的事，所以留在山顶上观察他们。
The other two climbed down into the crater to collect some lava for later study, but this being my first experience, I stayed at the top and watched them.
火山口的岩浆又沸腾起来，流遍山脊一带。
The crater was again boiling with lava which overflowed the back of the volcano.
另外两个人攀下火山口去收集日后研究用的岩浆，我是第一次经历这样的事，所以留在山顶上观察他们。
The other two climbed into the crater to collect some lava for late study, but this being my first experience, I stayed at the top and watched them.
另外两人爬下火山口去收集供日后研究用的岩浆，我是第一次经历这样的事，所以留在山顶上观察他们。
The other two climbed down into the crater to collect some lava for later study, but this_being_my_first_experience, _I stayed at the top and watched them.
圣多里尼火山的巨大岩浆房最后倒塌，形成了现有的喷火山口，巨大的海啸(潮汐波)向各个方面向外伸展。
When the enormous magma chamber at Santorini finally collapsed to form the existing caldera, enormous tsunamis (tidal waves) spread outward in all directions.
琼北第四纪火山区分布着为数众多、大小不一的射气岩浆喷发成因的低平火山口。
Maars of various scales produced by phreatomagmatic eruption are widely distributed in the Quaternary volcanic region of the Northern Hainan Island.
当岩浆通过火山口溢出地表时，便可称这种熔融的岩石为熔岩。
Sometimes magma reaches the surface through volcanoes. Then the molten rock is called lava.
科学家确定凹陷处是一个火山口，并且在它附近明亮的圆环是火山碎屑岩，是火山喷发出岩浆的残余，很象地球上的火山喷口。
The scientists determined that the depression was a volcanic vent, and the bright ring around it was pyroclastic, remnants of lava that had been spewed outward, much like a volcanic fountain on Earth.
该超单元的形成与幔源基性岩浆上侵及同源岩浆分异产生的中偏基性—中性岩浆多次侵入有关，属热气球式膨胀与火山口塌陷复合就位机制。
Its formation was related to the intrusion of basic magma(mantle source)to multi-time intrusions of basicly medium to medium magma which differentiated from the same magma. The co…
该超单元的形成与幔源基性岩浆上侵及同源岩浆分异产生的中偏基性—中性岩浆多次侵入有关，属热气球式膨胀与火山口塌陷复合就位机制。
Its formation was related to the intrusion of basic magma(mantle source)to multi-time intrusions of basicly medium to medium magma which differentiated from the same magma. The co…
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