| Geyser | 1964-08-28 |
|---|---|
| Echinus | 0737, 0905, 1017, 1131, 1247, 1406, 1521, 1638 |
| Steamboat | 1200 |
| Valentine | 0000 A |
| Values for Old Faithful Area | 1964-08-28 |
|---|---|
| Astronomical Twilight Begin | 03:56 |
| Nautical Twilight Begin | 04:34 |
| Civil Twilight Begin | 05:11 |
| Sunrise | 05:41 |
| Sunset | 19:07 |
| Civil Twilight End | 19:37 |
| Nautical Twilight End | 20:13 |
| Astronomical Twilight End | 20:52 |
| Moon Illumination | 72.93% |