| Geyser | 1991-07-22 |
|---|---|
| Crater Spring | 1200 |
| Echinus | 0740 ie maj, 1104, 1200, 1210, 1318 |
| Hurricane Vent | 1200 |
| Rubble | 1200 |
| Steamboat | 1200 |
| Sunday | 1200 |
| Whirligig | 1310, 1410 |
| Yellow Funnel Spring | 1200 |
| Values for Old Faithful Area | 1991-07-22 |
|---|---|
| Astronomical Twilight Begin | 03:47 |
| Nautical Twilight Begin | 04:40 |
| Civil Twilight Begin | 05:24 |
| Sunrise | 05:59 |
| Sunset | 21:00 |
| Civil Twilight End | 21:34 |
| Nautical Twilight End | 22:18 |
| Astronomical Twilight End | 23:11 |
| Moon Illumination | 82.59% |