Daily Sunspot Evaluation
Observation Sheet Sunday, 7 July 1974
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)
- 4
- Number of spots (f)
- 62
- Relative number (R)
- 102
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740707.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 18 | -13 | 15W | 127 | |||
| 2 | A – 2 | -17 | 37W | 149 | |||
| 3 | F – 33 | -14 | 47W | 159 | |||
| 4 | D – 9 | -12 | 62W | 174 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.