| Geyser | 1964-10-16 |
|---|---|
| Arsenic | 1800 |
| Constant | 1800 |
| Dark Cavern | 1800 |
| Echinus | 1408, 1556 |
| Emerald Spring | 1800 |
| Fireball | 1800 |
| Hurricane Vent | 1800 |
| Ledge | 1800 |
| Monarch | 1800 |
| Pinto | 1800 |
| Pinwheel | 1800 |
| Steamboat | 1800 |
| Whirligig | 1800 |
| Values for Old Faithful Area | 1964-10-16 |
|---|---|
| Astronomical Twilight Begin | 05:03 |
| Nautical Twilight Begin | 05:37 |
| Civil Twilight Begin | 06:10 |
| Sunrise | 06:40 |
| Sunset | 17:37 |
| Civil Twilight End | 18:06 |
| Nautical Twilight End | 18:40 |
| Astronomical Twilight End | 19:14 |
| Moon Illumination | 74.2% |