| Geyser | 1973-03-16 |
|---|---|
| Bear Den | 1759 |
| Constant | 0828 |
| Guardian | 0800 |
| Lion | 0440 |
| Old Faithful | 1126 short, 1211 long, 1322 short, 1413 long, 1524 long, 1627 long |
| Valentine | 0000 |
| Values for Old Faithful Area | 1973-03-16 |
|---|---|
| Astronomical Twilight Begin | 04:56 |
| Nautical Twilight Begin | 05:30 |
| Civil Twilight Begin | 06:04 |
| Sunrise | 06:33 |
| Sunset | 18:30 |
| Civil Twilight End | 18:59 |
| Nautical Twilight End | 19:33 |
| Astronomical Twilight End | 20:07 |
| Moon Illumination | 91.86% |