Daily Sunspot Evaluation
Observation Sheet Thursday, 18 October 1956
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)
- 9
- Number of spots (f)
- 27
- Relative number (R)
- 117
- Observer
- AK
- Reading
- all checks consistent
- File
- 19561018.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 28 | 24E | ||||
| 2 | J – 1 | 23 | 43E | ||||
| 3 | ? – 5 | 18 | 80E | ||||
| 4 | ? – 1 | -45 | 64E | ||||
| 5 | A – 2 | -23 | 5W | ||||
| 6 | D – 7 | -20 | 45W | ||||
| 7 | A – 1 | -12 | 72W | ||||
| 8 | J – 1 | 22 | 69W | ||||
| 9 | B – 8 | 18 | 16W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.