Daily Sunspot Evaluation
Observation Sheet Thursday, 12 October 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)
- 4
- Number of spots (f)
- 29
- Relative number (R)
- 69
- Observer
- SB
- Reading
- all checks consistent
- File
- 19671012.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | -26 | 59E | 119 | |||
| 2 | J – 2 | -25 | 47W | 225 | |||
| 3 | C – 8 | 17 | 42W | 220 | |||
| 4 | C – 17 | 15 | 16W | 194 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.