| Geyser | 1978-03-30 |
|---|---|
| Bear Den | 1345 |
| Blue | 1345 A |
| Little Whirligig | 1330 |
| Steamboat | 1400 |
| Values for Old Faithful Area | 1978-03-30 |
|---|---|
| Astronomical Twilight Begin | 04:27 |
| Nautical Twilight Begin | 05:03 |
| Civil Twilight Begin | 05:38 |
| Sunrise | 06:07 |
| Sunset | 18:47 |
| Civil Twilight End | 19:16 |
| Nautical Twilight End | 19:51 |
| Astronomical Twilight End | 20:27 |
| Moon Illumination | 65.18% |