| Geyser | 1977-09-09 |
|---|---|
| Constant | 1728 |
| Dishwater Spring | 1200 |
| Echinus | 1155 |
| Little Whirligig | 1730 |
| Orby | 1200 |
| Splutter Pot | 1740 |
| Whirligig | 1740 |
| Yellow Funnel Spring | 1200 |
| Values for Old Faithful Area | 1977-09-09 |
|---|---|
| Astronomical Twilight Begin | 05:14 |
| Nautical Twilight Begin | 05:51 |
| Civil Twilight Begin | 06:26 |
| Sunrise | 06:55 |
| Sunset | 19:45 |
| Civil Twilight End | 20:14 |
| Nautical Twilight End | 20:50 |
| Astronomical Twilight End | 21:26 |
| Moon Illumination | 17.75% |