灰粘度 ash viscosity
- 岛山冰山最近的爆发发生于1821年年底到1823年之间,熔岩粘度也很大,但那并不意味着火山会不断地产生细火山灰。
Eyjafjallajokull's most recent previous eruption, from late 1821 to early 1823, also had quite viscous lava. But that does not mean the volcano produced fine ash continuously.
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