Daily Sunspot Evaluation
Observation Sheet Thursday, 8 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)
- 44
- Relative number (R)
- 104
- Observer
- HM
- Reading
- all checks consistent
- File
- 19710708.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 26 | -6 | 39E | 126 | |||
| 2 | J – 2 | -12 | 73E | 92 | |||
| 3 | C – 5 | -9 | 41E | 124 | |||
| 4 | E – 9 | -15 | 67W | 232 | |||
| 5 | J – 1 | -8 | 75W | 240 | |||
| 6 | J – 1 | 16 | 64W | 229 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.