| Geyser | 1970-05-15 |
|---|---|
| Old Faithful | 0806 long, 0922 short, 1011 long, 1127 short, 1225 long, 1342 short, 1433 long, 1546 short, 1639 long |
| Riverside | 0720, 1315 |
| Spiteful | 1355 |
| Values for Old Faithful Area | 1970-05-15 |
|---|---|
| Astronomical Twilight Begin | 03:49 |
| Nautical Twilight Begin | 04:39 |
| Civil Twilight Begin | 05:21 |
| Sunrise | 05:55 |
| Sunset | 20:43 |
| Civil Twilight End | 21:17 |
| Nautical Twilight End | 21:59 |
| Astronomical Twilight End | 22:49 |
| Moon Illumination | 66.92% |