| Geyser | 1975-01-19 |
|---|---|
| Old Faithful | 0946 long, 1055 short, 1153 long, 1306 short, 1356 long, 1517 short, 1606 long, 1721 short |
| Vault | 1200-2359 |
| Values for Old Faithful Area | 1975-01-19 |
|---|---|
| Astronomical Twilight Begin | 06:11 |
| Nautical Twilight Begin | 06:46 |
| Civil Twilight Begin | 07:21 |
| Sunrise | 07:53 |
| Sunset | 17:14 |
| Civil Twilight End | 17:46 |
| Nautical Twilight End | 18:21 |
| Astronomical Twilight End | 18:56 |
| Moon Illumination | 37.06% |