Daily Sunspot Evaluation
Observation Sheet Tuesday, 1 August 1972
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 11
- Number of spots (f)
- 61
- Relative number (R)
- 171
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720801.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 11 | 12 | 46E | 10 | |||
| 2 | B – 7 | -4 | 32E | 24 | |||
| 3 | A – 1 | 0 | 19E | 37 | |||
| 4 | A – 6 | -20 | 01E | 55 | |||
| 5 | C – 11 | -18 | 04W | 60 | |||
| 6 | C – 4 | -15 | 12W | 68 | |||
| 7 | E – 16 | -14 | 28W | 84 | |||
| 8 | A – 1 | -8 | 30W | 86 | |||
| 9 | A – 1 | -2 | 47W | 103 | |||
| 10 | J – 1 | 5 | 64W | 120 | |||
| 11 | A – 2 | 7 | 52W | 108 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.