Daily Sunspot Evaluation
Observation Sheet Wednesday, 13 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)
- 11
- Number of spots (f)
- 63
- Relative number (R)
- 173
- Observer
- LT
- Reading
- all checks consistent
- File
- 19670913.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 25 | 12 | 16E | 186 | |||
| 2 | A – 5 | 11 | 44E | 158 | |||
| 3 | J – 1 | -30 | 53E | 149 | |||
| 4 | A – 2 | -21 | 22W | 224 | |||
| 5 | J – 2 | -20 | 27W | 229 | |||
| 6 | J – 1 | -23 | 59W | 261 | |||
| 7 | B – 9 | 8 | 4W | 206 | |||
| 8 | A – 1 | 8 | 24W | 226 | |||
| 9 | A – 1 | 13 | 59W | 261 | |||
| 10 | ? – 13 | 23 | 72W | 274 | |||
| 11 | J – 3 | 28 | 66W | 268 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.