although every geyser is different, the time ot some geysers eruptions could be predicted. for instance the old faithful geyser in yellowstone national park erupts for up to five minutes adout every 30-90 minutes while the grand geyser in the same park erupts for a few second every few minutes.
sometimes there are distinct underground links between two geysers, making them soot upward in a sequence like a water firework display. the pohutu geyser in nwe zealand is connected to the prince of wales feathers geyser. the prince of wales fathers geyser erupts for two five hours, and then dies down. as it dies down. as it dies down, the main, tall the pohutu geyser beings to erupt upward.
교과서 본문중 일부인데.. 대략 간헐천들의 분출 시간을 알 수 있고 특이하게 연결되어 있기도 하다는건 알겠는데,
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