| Geyser | 1991-06-23 |
|---|---|
| Black Growler | 1200 |
| Constant | 1541 |
| Echinus | 0900, 1000, 1010, 1110, 1150, 1235 maj, 1415, 1455, 1607, 1659, 1742 maj, 2159 |
| Ledge | 1200 |
| Scummy Pool | 1200 |
| Valentine | 1200 |
| Vixen | 1015 |
| Whirligig | 1149, 1457 |
| Values for Old Faithful Area | 1991-06-23 |
|---|---|
| Astronomical Twilight Begin | 03:10 |
| Nautical Twilight Begin | 04:13 |
| Civil Twilight Begin | 05:02 |
| Sunrise | 05:39 |
| Sunset | 21:11 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:37 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 86.77% |