phreatic in A Sentence

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    Several Phreatic eruptions post-date the roughly 7300-year-old Akahoya tephra from Kikai caldera.

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    Subglacial and Phreatic eruptions are defined by their eruptive mechanism, and vary in strength.

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    PHIVOLCS reported between 1 and 7 volcanic earthquakes at Kanlaon were recorded each day during 2-8 December, prior to the Phreatic eruption on 9 December.

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    This activity could not have been forecast from the volcano monitoring data, as Phreatic eruptions are caused by water suddenly flashing to steam upon contact with hot rocks.

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    5

    Since its first historical eruption in 1772, in which a catastrophic debris avalanche destroyed 40 villages, only two small Phreatic eruptions have occurred from vents in the NE-flank fumarole field, Kawah Mas.

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    6

    On 14 January PHIVOLCS raised the Alert Level to 3, noting a marked increase in activity characterized by three Phreatic eruptions and 158 rockfall events between 1621 on 13 January and 1925 on 14 January.

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