Today's Eruptions

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Geyser2021-10-18
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Values for Old Faithful Area2021-10-182021-10-19
Civil Twilight Begin07:1307:14
Sunrise07:4207:44
Sunset18:3318:32
Civil Twilight End19:0319:01
Moon Illumination94.41%98.13%
Last Known Eruption
Old Faithful

147d 9h 15m ago

Grand

121d 22m ago

Castle

2y 173d 16h 27m ago

Riverside

2y 174d 3h 2m ago

Daisy

180d 15h 25m ago

Great Fountain

2y 174d 2h 43m ago

Beehive

1y 181d 1h 14m ago

Steamboat

2y 177d 12m ago