| Geyser | 1974-12-06 |
|---|---|
| Event Non-Geyser Related | 1511 |
| Old Faithful | 0930 short, 1013 long, 1133 short, 1221 long, 1342 short, 1429 long, 1557 long, 1713 short |
| Round | 1512 |
| Values for Old Faithful Area | 1974-12-06 |
|---|---|
| Astronomical Twilight Begin | 06:00 |
| Nautical Twilight Begin | 06:35 |
| Civil Twilight Begin | 07:11 |
| Sunrise | 07:44 |
| Sunset | 16:44 |
| Civil Twilight End | 17:16 |
| Nautical Twilight End | 17:53 |
| Astronomical Twilight End | 18:28 |
| Moon Illumination | 51.61% |