| Geyser | 1973-01-31 |
|---|---|
| Beehive | 1627 |
| Castle | 1700 |
| Lion | 1602, 1627 |
| Old Faithful | 0847 short, 0934 long, 1049 short, 1142 long, 1258 short, 1342 long, 1454 short, 1541 long, 1654 short |
| Values for Old Faithful Area | 1973-01-31 |
|---|---|
| Astronomical Twilight Begin | 06:02 |
| Nautical Twilight Begin | 06:36 |
| Civil Twilight Begin | 07:11 |
| Sunrise | 07:42 |
| Sunset | 17:31 |
| Civil Twilight End | 18:02 |
| Nautical Twilight End | 18:36 |
| Astronomical Twilight End | 19:11 |
| Moon Illumination | 9.23% |