| Geyser | 1977-01-23 |
|---|---|
| Beehive | 1235 |
| Echinus | 1203 |
| Old Faithful | 0810, 1015 long, 1128, 1244, 1401, 1458, 1621 short, 1711 long, 1831 |
| Porkchop | 1130 ie |
| Values for Old Faithful Area | 1977-01-23 |
|---|---|
| Astronomical Twilight Begin | 06:08 |
| Nautical Twilight Begin | 06:43 |
| Civil Twilight Begin | 07:18 |
| Sunrise | 07:50 |
| Sunset | 17:20 |
| Civil Twilight End | 17:51 |
| Nautical Twilight End | 18:27 |
| Astronomical Twilight End | 19:01 |
| Moon Illumination | 15.33% |