| Geyser | 1986-10-09 |
|---|---|
| Blue | 1200 |
| Cistern Spring | 1200 |
| Dark Cavern | 1200 |
| Echinus | 1209, 1351, 1416, 1449, 1553, 1602 |
| Emerald Spring | 1200 |
| Palpitator Spring | 1200 |
| Porkchop | 1200 |
| Steamboat | 1200 |
| Sunday | 1200 |
| Veteran | 1200 |
| Values for Old Faithful Area | 1986-10-09 |
|---|---|
| Astronomical Twilight Begin | 05:54 |
| Nautical Twilight Begin | 06:28 |
| Civil Twilight Begin | 07:01 |
| Sunrise | 07:30 |
| Sunset | 18:50 |
| Civil Twilight End | 19:19 |
| Nautical Twilight End | 19:52 |
| Astronomical Twilight End | 20:26 |
| Moon Illumination | 35.17% |