| Geyser | 1973-02-12 |
|---|---|
| Castle | 1625 |
| Old Faithful | 0845 long, 0959 short, 1045 long, 1204 short, 1241 long, 1356 short, 1452 long, 1606 short, 1700 long |
| Vault | 1510 |
| Values for Old Faithful Area | 1973-02-12 |
|---|---|
| Astronomical Twilight Begin | 05:49 |
| Nautical Twilight Begin | 06:23 |
| Civil Twilight Begin | 06:57 |
| Sunrise | 07:27 |
| Sunset | 17:47 |
| Civil Twilight End | 18:17 |
| Nautical Twilight End | 18:52 |
| Astronomical Twilight End | 19:25 |
| Moon Illumination | 69.06% |