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In eruption since 2011

Today's Eruptions

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Values for Old Faithful Area2021-04-192021-04-20
Civil Twilight Begin06:0005:59
Civil Twilight End20:4320:45
Moon Illumination39.83%49.74%
Last Known Eruption
Old Faithful

1y 53d 19h 55m ago


1y 184d 15h 12m ago


1y 356d 11h 45m ago


1y 356d 22h 20m ago


1y 319d 12h 30m ago

Great Fountain

1y 356d 22h 1m ago


363d 20h 32m ago


1y 359d 19h 30m ago

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