| 21. | In September 1985, as earthquakes and phreatic eruptions rocked the area, local officials began planning for an evacuation.
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| 22. | The ash erupted during a phreatic eruption 564 686 years Paramushir island in the northern portion of the Kuril Islands.
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| 23. | Phreatic eruptions ( or steam-blast eruptions ) are a type of eruption driven by the expansion of steam.
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| 24. | Its historical eruptions generally have explosive, and there have been many phreatic eruptions, and some have produced pyroclastic flows.
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| 25. | In September 1985, as earthquakes and phreatic eruptions rocked the area around the volcano, officials began planning for evacuation.
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| 26. | Its summit contains the active craters of Ponmachineshiri and Naka-Machineshiri, sites of frequent phreatic eruptions in historical time.
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| 27. | Most eruptions from the crater have been mild Phreatic eruptions, but Lava domes and lava flows have also been erupted.
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| 28. | Minor eruptions were reported 1751, 1864, and 1937, and the latest eruption was a small phreatic eruption in 1980.
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| 29. | This fragmental material was interrupted by explosions of steam, water, ash, rock, and volcanic bombs called phreatic eruptions.
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| 30. | Three days after the Bah�a de Car�quez earthquake, on August 7, 1998, a moderate phreatic eruption occurred in Wawa Pichincha.
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