| Geyser | 1973-02-06 |
|---|---|
| Castle | 1030 |
| Depression | 1028 |
| Grand | 1645 |
| Old Faithful | 0815 long, 0926 long, 1033 long, 1140 short, 1226 long, 1338 short, 1421 long, 1536 short, 1626 long |
| Riverside | 1547 |
| Values for Old Faithful Area | 1973-02-06 |
|---|---|
| Astronomical Twilight Begin | 05:56 |
| Nautical Twilight Begin | 06:30 |
| Civil Twilight Begin | 07:04 |
| Sunrise | 07:35 |
| Sunset | 17:39 |
| Civil Twilight End | 18:09 |
| Nautical Twilight End | 18:44 |
| Astronomical Twilight End | 19:18 |
| Moon Illumination | 9.12% |