| Geyser | 1964-09-25 |
|---|---|
| Colloidal Pool | 1000, 1200 |
| Echinus | 0911, 1012, 1110, 1209, 1308, 1408, 1508, 1608 |
| Hurricane Vent | 0000, 1200 |
| Ledge | 1600 |
| Steamboat | 0840-1600 |
| Valentine | 1530 A |
| Whirligig | 1800 |
| Values for Old Faithful Area | 1964-09-25 |
|---|---|
| Astronomical Twilight Begin | 04:36 |
| Nautical Twilight Begin | 05:11 |
| Civil Twilight Begin | 05:45 |
| Sunrise | 06:14 |
| Sunset | 18:15 |
| Civil Twilight End | 18:44 |
| Nautical Twilight End | 19:18 |
| Astronomical Twilight End | 19:52 |
| Moon Illumination | 84.75% |