| Geyser | 1973-05-08 |
|---|---|
| Castle | 1539 |
| Grand | 1320 |
| Ledge | 1655 A |
| Lion | 1050, 1415, 1706 |
| Old Faithful | 0818 long, 0940 short, 1023 long, 1142 long, 1246 short, 1351 long, 1508 short, 1554 long, 1723 short |
| Values for Old Faithful Area | 1973-05-08 |
|---|---|
| Astronomical Twilight Begin | 04:02 |
| Nautical Twilight Begin | 04:49 |
| Civil Twilight Begin | 05:30 |
| Sunrise | 06:03 |
| Sunset | 20:35 |
| Civil Twilight End | 21:08 |
| Nautical Twilight End | 21:49 |
| Astronomical Twilight End | 22:36 |
| Moon Illumination | 36.21% |