| Geyser | 1979-06-17 |
|---|---|
| Arsenic | 1126 |
| Blue | 1015, 1345 ie |
| Constant | 1019, 1203 |
| Little Whirligig | 1112 |
| Monarch | 1200 |
| Pinwheel | 1015, 1400 |
| Rubble | 1800 |
| Whirligig | 0927 ie, 1022, 1155 |
| Values for Old Faithful Area | 1979-06-17 |
|---|---|
| Astronomical Twilight Begin | 03:09 |
| Nautical Twilight Begin | 04:12 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:37 |
| Sunset | 21:10 |
| Civil Twilight End | 21:46 |
| Nautical Twilight End | 22:35 |
| Astronomical Twilight End | 23:38 |
| Moon Illumination | 49.56% |