A volcanic activity can be suspected.Logical formLearned from5 sentences. Responses can be to volcanic activity.Logical formLearned from5 sentences. A volcanic ash can be heavy.Logical formLearned from5 sentences. Planes can be from a volcanic (ash plume).Logical formLearned from5 sentences. An impact may pertain-to a volcanic eruption.Logical formLearned from5 sentences. A majority of a continent can be free of volcanic ash.Logical formLearned from5 sentences. An (ash travel nightmare) can be volcanic.Logical formLearned from5 sentences. A cloud of volcanic ash may shut_down (air traffic).Logical formLearned from5 sentences. Volcanic activity may produce plumes.Logical formLearned from5 sentences. Crags can be volcanic.Logical formLearned from5 sentences. A country can be prone to volcanic eruptions.Logical formLearned from5 sentences. Volcanic tremors can be nonstop.Logical formLearned from5 sentences. Volcanic earthquakes may be triggered.Logical formLearned from5 sentences. A volcanic ash can be muddy.Logical formLearned from5 sentences. A volcanic rock can be molten.Logical formLearned from5 sentences.