| Geyser | 1980-07-26 |
|---|---|
| Arsenic | 1248 ie |
| Constant | 1211 |
| Echinus | 1354 |
| Guardian | 1526 |
| Little Whirligig | 1200:41 |
| Porkchop | 1750 ie |
| Veteran | 1539, 1559:40, 1612:31, 2320 |
| Values for Old Faithful Area | 1980-07-26 |
|---|---|
| Astronomical Twilight Begin | 03:56 |
| Nautical Twilight Begin | 04:47 |
| Civil Twilight Begin | 05:30 |
| Sunrise | 06:04 |
| Sunset | 20:55 |
| Civil Twilight End | 21:29 |
| Nautical Twilight End | 22:12 |
| Astronomical Twilight End | 23:02 |
| Moon Illumination | 96.97% |