Daily Sunspot Evaluation
Observation Sheet Tuesday, 12 September 1967
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)
- 7
- Number of spots (f)
- 48
- Relative number (R)
- 118
- Observer
- SB
- Reading
- all checks consistent
- File
- 19670912.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 7 | 11 | 25E | 190 | |||
| 2 | A – 4 | 13 | 31E | 184 | |||
| 3 | ? – 1 | -30 | 68E | 147 | |||
| 4 | C – 6 | -21 | 14W | 229 | |||
| 5 | J – 1 | -23 | 45W | 260 | |||
| 6 | E – 21 | 20 | 60W | 275 | |||
| 7 | D – 8 | 28 | 53W | 268 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.