| Geyser | 1974-12-28 |
|---|---|
| Beehive | 1025 |
| Lion | 1106 |
| Old Faithful | 0853 short, 0934 long, 1046 short, 1141 long, 1254 short, 1346 long, 1505 short, 1602 long |
| Riverside | 1335 |
| Values for Old Faithful Area | 1974-12-28 |
|---|---|
| Astronomical Twilight Begin | 06:13 |
| Nautical Twilight Begin | 06:49 |
| Civil Twilight Begin | 07:25 |
| Sunrise | 07:59 |
| Sunset | 16:50 |
| Civil Twilight End | 17:24 |
| Nautical Twilight End | 18:00 |
| Astronomical Twilight End | 18:36 |
| Moon Illumination | 98.96% |