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Geyser1971-07-21
Africa1820
Arch Steam Vent 1200
Basin 1000
Bear Den0910
Castle1255
Echinus0825, 0945, 1020, 1103
Grand1027, 1820
Great Fountain1655
Lion0834, 1011, 1145, 1325, 1445, 1530, 1712, 1850, 2020, 2125
North Goggle1930
Old Faithful0810 short, 0855 long, 1021 short, 1126 long, 1238 long, 1344 long, 1456 short, 1544 long, 1657 short, 1743 long, 1853 short, 1959
Riverside1115, 1710
Values for Old Faithful Area1971-07-21
Astronomical Twilight Begin03:45
Nautical Twilight Begin04:38
Civil Twilight Begin05:23
Sunrise05:58
Sunset21:01
Civil Twilight End21:35
Nautical Twilight End22:20
Astronomical Twilight End23:13
Moon Illumination1.42%

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