Alerts can be volcanic.Logical formLearned from6 sentences. A plume of volcanic ash may disrupt flights.Logical formLearned from6 sentences. Volcanic ash may undergo concentrations.Logical formLearned from6 sentences. A volcanic ash may disrupt (air travel).Logical formLearned from6 sentences. A risk can be from volcanic ash.Logical formLearned from6 sentences. A landslide can be constituted-of-or-filled-with volcanic ash.Logical formLearned from6 sentences. A volcanic island can be undeveloped.Logical formLearned from6 sentences. Clouds can be constituted-of-or-filled-with volcanic gas.Logical formLearned from6 sentences. Cubic metres can be constituted-of-or-filled-with volcanic rock.Logical formLearned from6 sentences. A volcanic eruption can be on an island.Logical formLearned from6 sentences. Fears may grow of a volcanic eruption.Logical formLearned from6 sentences. A volcanic eruption can be on an indonesian island.Logical formLearned from6 sentences. A term can be for clouds of volcanic gases.Logical formLearned from6 sentences. A coastline can be volcanic.Logical formLearned from6 sentences. A volcanic activity may continue.Logical formLearned from6 sentences.