| Geyser | 1978-08-27 |
|---|---|
| Cistern Spring | 0910 |
| Crater Spring | 1200 |
| Dark Cavern | 1100 |
| Echinus | 0853, 1009, 1124, 1239, 1400 A |
| Porkchop | 0935 ie |
| Splutter Pot | 1040 |
| Steamboat | 0910 |
| Veteran | 1435 |
| Whirligig | 1040 |
| Values for Old Faithful Area | 1978-08-27 |
|---|---|
| Astronomical Twilight Begin | 04:53 |
| Nautical Twilight Begin | 05:33 |
| Civil Twilight Begin | 06:09 |
| Sunrise | 06:40 |
| Sunset | 20:09 |
| Civil Twilight End | 20:39 |
| Nautical Twilight End | 21:16 |
| Astronomical Twilight End | 21:55 |
| Moon Illumination | 33.49% |