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Geyser1971-02-20
Grotto1107
Grotto Fountain1055
Old Faithful1019 short, 1225 long, 1337 long, 1440 short, 1610 long
Riverside1117
Values for Old Faithful Area1971-02-20
Astronomical Twilight Begin05:38
Nautical Twilight Begin06:12
Civil Twilight Begin06:46
Sunrise07:15
Sunset17:58
Civil Twilight End18:27
Nautical Twilight End19:01
Astronomical Twilight End19:35
Moon Illumination31.85%

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