Daily Sunspot Evaluation
Observation Sheet Thursday, 4 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)
- 3
- Number of spots (f)
- 68
- Relative number (R)
- 98
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740704.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 47 | -15 | 05W | 157 | |||
| 2 | B – 4 | -12 | 23W | 175 | |||
| 3 | C – 17 | -9 | 52W | 204 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.