| Geyser | 1976-02-28 |
|---|---|
| Old Faithful | 0843 long, 0948 long, 1105 long, 1226 long, 1342 short, 1423 long, 1544 short, 1632 long, 1751 short, 1842 long, 2009 long |
| Riverside | 1430 |
| Values for Old Faithful Area | 1976-02-28 |
|---|---|
| Astronomical Twilight Begin | 05:26 |
| Nautical Twilight Begin | 06:00 |
| Civil Twilight Begin | 06:33 |
| Sunrise | 07:03 |
| Sunset | 18:08 |
| Civil Twilight End | 18:38 |
| Nautical Twilight End | 19:11 |
| Astronomical Twilight End | 19:45 |
| Moon Illumination | 2.71% |