| Geyser | 1977-02-20 |
|---|---|
| Beehive | 1039 |
| Beehive's Indicator | 1036 |
| Castle | 0900 ie |
| Depression | 1458 |
| Grand | 1136 ie |
| Old Faithful | 0901 long, 1011, 1132 long, 1238 long, 1356 long, 1514 long, 1613 long, 1733 long, 1844 short |
| Values for Old Faithful Area | 1977-02-20 |
|---|---|
| Astronomical Twilight Begin | 05:38 |
| Nautical Twilight Begin | 06:11 |
| Civil Twilight Begin | 06:45 |
| Sunrise | 07:15 |
| Sunset | 17:59 |
| Civil Twilight End | 18:28 |
| Nautical Twilight End | 19:02 |
| Astronomical Twilight End | 19:36 |
| Moon Illumination | 4.92% |