| Geyser | 1972-05-01 |
|---|---|
| Great Fountain | 1952 |
| Old Faithful | 0932 long, 1046 long, 1205 long, 1249, 1410 long, 1505 long, 1626 long, 1710 long |
| Values for Old Faithful Area | 1972-05-01 |
|---|---|
| Astronomical Twilight Begin | 04:17 |
| Nautical Twilight Begin | 05:01 |
| Civil Twilight Begin | 05:40 |
| Sunrise | 06:12 |
| Sunset | 20:27 |
| Civil Twilight End | 20:59 |
| Nautical Twilight End | 21:39 |
| Astronomical Twilight End | 22:23 |
| Moon Illumination | 93.44% |