| Geyser | 1964-08-30 |
|---|---|
| Echinus | 0800, 0902, 1003, 1106, 1208, 1308, 1421, 1534, 1642 |
| Pinwheel | 0920, 1710 |
| Steamboat | 0730 |
| Valentine | 1659 |
| Values for Old Faithful Area | 1964-08-30 |
|---|---|
| Astronomical Twilight Begin | 03:59 |
| Nautical Twilight Begin | 04:37 |
| Civil Twilight Begin | 05:14 |
| Sunrise | 05:44 |
| Sunset | 19:03 |
| Civil Twilight End | 19:33 |
| Nautical Twilight End | 20:09 |
| Astronomical Twilight End | 20:48 |
| Moon Illumination | 51.2% |