Daily Sunspot Evaluation
Observation Sheet Monday, 12 July 1971
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)
- 6
- Number of spots (f)
- 76
- Relative number (R)
- 136
- Observer
- HM
- Reading
- all checks consistent
- File
- 19710712.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 11 | 16 | 55E | 57 | |||
| 2 | ? – 1 | 6 | 84E | 28 | |||
| 3 | A – 1 | -13 | 26E | 86 | |||
| 4 | C – 11 | -12 | 18E | 93 | |||
| 5 | A – 1 | -15 | 17E | 95 | |||
| 6 | E – 51 | -8 | 15W | 127 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.