| Geyser | 1973-05-02 |
|---|---|
| Beehive | 1145 |
| Castle | 1422 |
| Grand | 0805 ie, 1603 |
| Old Faithful | 0915 long, 1031 short, 1124 long, 1252 short, 1336 long, 1502 short, 1546 long, 1659 short, 1748 long |
| Riverside | 0815, 1355 |
| Values for Old Faithful Area | 1973-05-02 |
|---|---|
| Astronomical Twilight Begin | 04:15 |
| Nautical Twilight Begin | 04:59 |
| Civil Twilight Begin | 05:39 |
| Sunrise | 06:11 |
| Sunset | 20:28 |
| Civil Twilight End | 21:00 |
| Nautical Twilight End | 21:40 |
| Astronomical Twilight End | 22:25 |
| Moon Illumination | 0.59% |