A strong earthquake may shake a string of volcanic islands off a world-city.Logical formLearned from3 sentences. A volcanic eruption may be jolted.Logical formLearned from3 sentences. A volcanic eruption may undergo warnings.Logical formLearned from3 sentences. A series of earthquakes may suggest volcanic activity.Logical formLearned from3 sentences. Mudslides can be constituted-of-or-filled-with volcanic ash.Logical formLearned from3 sentences. Volcanic activity may help.Logical formLearned from3 sentences. A volcanic activity can be worldwide.Logical formLearned from3 sentences. Volcanic ash may pose hazards to aircraft.Logical formLearned from3 sentences. (Ash layers) can be volcanic.Logical formLearned from3 sentences. Quakes may be related to volcanic activity.Logical formLearned from3 sentences. A volcanic activity may offer an opportunity.Logical formLearned from3 sentences. Volcanic activity may last.Logical formLearned from3 sentences. Seismic waves may be caused by volcanic activity.Logical formLearned from3 sentences. An island can be for a volcanic eruption.Logical formLearned from3 sentences. Forests can be volcanic.Logical formLearned from3 sentences.