John Pallister, retired chief of the Volcano Disaster Assistance Program, looks over an example of a field installation used for monitoring a volcano at the USGS office in Vancouver in 2016. (Amanda ...
Mount Etna is the tallest volcano in Europe. At more than 3,000 metres, its summit towers over the port city of Catania on the east coast of Sicily. But much of the volcano is underwater - its ...
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