| Geyser | 1973-09-21 |
|---|---|
| Africa | 1800 |
| Congress Pool | 1800 |
| Dabble | 1026 ie |
| Dishwater Spring | 1030 |
| Echinus | 1045, 1145, 1245, 1347:30, 1447, 1549, 1649, 1751 |
| Ledge | 1800 |
| Mystic Spring | 1030 |
| Orby | 1026 |
| Yellow Funnel Spring | 1030 |
| Values for Old Faithful Area | 1973-09-21 |
|---|---|
| Astronomical Twilight Begin | 05:31 |
| Nautical Twilight Begin | 06:06 |
| Civil Twilight Begin | 06:40 |
| Sunrise | 07:09 |
| Sunset | 19:23 |
| Civil Twilight End | 19:52 |
| Nautical Twilight End | 20:26 |
| Astronomical Twilight End | 21:01 |
| Moon Illumination | 32.37% |