| Geyser | 1991-08-19 |
|---|---|
| Arsenic | 1237, 1255 |
| Echinus | 1030 maj, 1210, 1345, 1632 |
| Morning | 0334, 0725, 1058, 1413, 1803, 2159 |
| Valentine | 1644 A |
| Veteran | 1100 A maj, 1400 |
| Whirligig | 1044 |
| Values for Old Faithful Area | 1991-08-19 |
|---|---|
| Astronomical Twilight Begin | 04:39 |
| Nautical Twilight Begin | 05:21 |
| Civil Twilight Begin | 05:59 |
| Sunrise | 06:30 |
| Sunset | 20:23 |
| Civil Twilight End | 20:54 |
| Nautical Twilight End | 21:32 |
| Astronomical Twilight End | 22:13 |
| Moon Illumination | 69.1% |