| Geyser | 1972-04-30 |
|---|---|
| Grand | 0400 |
| Lion | 1028 |
| Old Faithful | 0915 long, 1022 long, 1143 long, 1252 long, 1344 long, 1502 long, 1553 long, 1702 long |
| Values for Old Faithful Area | 1972-04-30 |
|---|---|
| Astronomical Twilight Begin | 04:19 |
| Nautical Twilight Begin | 05:03 |
| Civil Twilight Begin | 05:42 |
| Sunrise | 06:14 |
| Sunset | 20:26 |
| Civil Twilight End | 20:58 |
| Nautical Twilight End | 21:37 |
| Astronomical Twilight End | 22:21 |
| Moon Illumination | 97.23% |