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Geyser1981-07-30
Dark Cavern0908, 0910, 0911, 0912
Echinus1106, 1159
Hurricane Vent0942
Morning1200
Sunday1610:24 maj, 1617:58 maj, 1625:20 maj, 1634 maj, 1640:36 maj, 1648:20, 1654:49 maj,  1900
Whirligig0924, 1523, 1604, 1646
Values for Old Faithful Area1981-07-30
Astronomical Twilight Begin04:03
Nautical Twilight Begin04:52
Civil Twilight Begin05:34
Sunrise06:08
Sunset20:51
Civil Twilight End21:24
Nautical Twilight End22:06
Astronomical Twilight End22:55
Moon Illumination1.09%

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