Daily Sunspot Evaluation
Observation Sheet Wednesday, 7 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)
- 5
- Number of spots (f)
- 57
- Relative number (R)
- 107
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710707.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 18 | -6 | 51E | 127 | |||
| 2 | B – 9 | -9 | 54E | 124 | |||
| 3 | F – 19 | -13 | 52W | 230 | |||
| 4 | H – 10 | -8 | 64W | 242 | |||
| 5 | J – 1 | 16 | 52W | 230 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.