It's unknown whether the lava is residual material that's draining through the underground tube system or if the flow is still being supplied by lava from the crater, scientists say.

科学工作者们说，不知道熔岩是否是地下管道系统排出的残留物质，或者是否火山口的熔岩仍然在提供流量。

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All types of volcanic cone, crater, lava platform, lava flow lakes and other volcanic landscape is very prominent, constitute a magnificent volcanic tourist landscape.

各种类型的火山锥、火山口、熔岩台地、熔岩流堰塞湖泊等火山地貌十分显目，构成壮丽的火山旅游景观。

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Increased lava flow during the past day and a new lava dome forming at the peak triggered immediate concerns.

在过去的几天里，岩浆不断地涌出，新的火山堆在一触即发的火山顶形成。

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However, Tuesday's incident isn't considered an eruption because it resulted in no lava flow.

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Jake was a consequence of those residual fluids, eventually solidifying just inside a Martian volcano or in a lava flow.

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But like a lava flow, casualties should be rare because the information and process is slow enough to allow escape.

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