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Should Naples fear a big bang from Vesuvius?

发布时间:2017-08-08 02:01:11来源:未知点击:

RESIDENTS of Naples, take note: the hazard posed by Vesuvius may have to be rethought after the discovery that its magma chamber has been moving upwards towards its mouth. Bruno Scaillet at the University of Orléans, France, and colleagues studied the proportions and types of crystal in rocks erupted from Vesuvius on four different occasions: 7800 years ago, 3600 years ago, 1929 years ago (Pompeii) and 1536 years ago. This allowed them to estimate the pressure, and hence depth, that each sample crystallised at. By combining this with results from previous research,