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维苏威火山位于意大利那不勒斯市东南,海拔1281米,是一座复式火山。公元79年的大喷发把附近的庞贝、赫库兰尼姆和斯塔比亚等三座著名的海滨城市全部掩埋。18世纪中叶以后,考古学家才把庞贝城从火山灰中发掘出来。火山喷发从公元79年8月24日凌晨1时开始,当时形成了一个很高的布里尼式喷发柱。岩浆从深部岩浆房迅速上升,喷发率为7.7万吨/秒,粘度很大。上午8时,岩浆成分转为铁镁质,即从原来喷出的白色浮岩等转到后来喷出的灰色浮岩。8月
Vesuvius volcano is located in Naples, southeast Italy, 1,281 meters above sea level, is a complex volcano. The great eruption in 79 AD completely buried the three famous coastal cities such as Pompeii, Herculaneum and Stabia. After the mid-18th century, archaeologists unearthed Pompeii from volcanic ash. Volcanic eruptions began at 1 a.m. on August 24, AD 79, when a very tall Brinjal eruption was formed. The magma rapidly rose from the deep magma chamber with an eruption rate of 77,000 t / s and a high viscosity. At 8:00 a.m., the magmatic component was converted to Fe-Mg-magma, ie, from the white pumice emanating from the original to the later gray pumice ejected. August