| Geyser | 1964-09-30 |
|---|---|
| Colloidal Pool | 1800, 1800 |
| Echinus | 1012-1311, 1012, 1115, 1209, 1311 |
| Hurricane Vent | 1800 |
| Ledge | 1800 |
| Steamboat | 0600 |
| Veteran | 1230 ie |
| Values for Old Faithful Area | 1964-09-30 |
|---|---|
| Astronomical Twilight Begin | 04:43 |
| Nautical Twilight Begin | 05:17 |
| Civil Twilight Begin | 05:51 |
| Sunrise | 06:20 |
| Sunset | 18:05 |
| Civil Twilight End | 18:34 |
| Nautical Twilight End | 19:08 |
| Astronomical Twilight End | 19:42 |
| Moon Illumination | 31.5% |