| Geyser | 1967-08-12 |
|---|---|
| Bear Den | 1753 |
| Ebony | 1108 ?, 1345 |
| Echinus | 0856, 0947, 1035, 1124, 1214, 1354, 1536, 1626, 1716 |
| Guardian | 1430 A |
| Steamboat | 1303 |
| Valentine | 1540 |
| Veteran | 1155, 1405 |
| Values for Old Faithful Area | 1967-08-12 |
|---|---|
| Astronomical Twilight Begin | 04:26 |
| Nautical Twilight Begin | 05:10 |
| Civil Twilight Begin | 05:50 |
| Sunrise | 06:22 |
| Sunset | 20:34 |
| Civil Twilight End | 21:06 |
| Nautical Twilight End | 21:45 |
| Astronomical Twilight End | 22:29 |
| Moon Illumination | 43.05% |