NPS Geyser Behavior Chart
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Upper Geyser Basin
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LocationAverage IntervalDurationHeight (ft/m)
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Old Faithful*94 or 64 min (+/- 10 minutes)1.5-5 min106-184'/30-55m
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ArtemisiaIrregular (9-31 hours)5-25 min30'/9m
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AurumIrregular (4-22 hours)70 sec20'/6m
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Baby Daisy35-55 min3 min25'/8m
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BeehiveIrregular (intervals range from 22-36 hours to over two weeks)5 min150+'/45+m
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"Boardwalk"Irregular5-10 min20'/6m
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Castle*13 hours 45 minutes (+/- 45 minutes)
2nd major after a minor: 14 hours 45 minutes (+/- 45 minutes)
15-20 min (frequent minor eruptions)
75'/24m
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Daisy*2 hours 45 minutes (+/- 30 min or longer if windy)3.5 min75'/24m
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DepressionIrregular (2.5 to 4+ hours)6 min10'/3m
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Fan & MortarIrregular. Summer 2013 intervals ranged from 3-6 days. Last eruption: 03/14.35 min100+'/30+m
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GiantLast eruptions: 10/3/2008; 2/8-9/2009; 1/15-16/2010; 1/22/2010; 9/28/2015 - electronic90+ minutes200+'/60+
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GiantessLast eruptions: 1/3/2011; 5/7-8/2011; 9/13/2011; 1/29/144-48 hours150+'/45+m
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Grand*7 hours 15 minutes (+/- 75 minutes)8-12 min160+'/48+m
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LionVariable intervals between series; 60-90 minute intervals within a Lion series6-7 min initial
3-5 min succeeding
60'/18m
30'/9m
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Little Cub30-45 minutes when regular3-5 min5'/1.5m
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Oblong3-7 hours5-7 minutes25'/8m
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PlumeIrregular. Dormant since 2012.1 min25'/8m
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Riverside*6 hours 20 min (+/- 30 min)20 min75'/24m
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Lower Geyser Basin
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Fountain4.5-7 hours25-50 min50'/15m
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Great Fountain*10 hours 45 minutes (+/- 2 hours)45-60 min70-200+'/22-60+m
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Norris Geyser Basin
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EchinusLast eruptions: 6/18/12; 5/5/13; 7/3/15; 8/12/15; 8/19/15; 8/31/153-5 min30+'/9+m
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SteamboatLast eruptions 5/23/05; 7/31/13; 9/3/14
10+ min (water phase)
hours to days (steam phase)
300+'/90+m
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