Daily Sunspot Evaluation
Observation Sheet Thursday, 31 October 1957
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)
- 19
- Number of spots (f)
- 137
- Relative number (R)
- 327
- Observer
- FY
- Reading
- all checks consistent
- File
- 19571031.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 2 | 40 | 2E | ||||
| 2 | E – 18 | 26 | 8E | ||||
| 3 | A – 1 | 38 | 46E | ||||
| 4 | A – 2 | 40 | 68E | ||||
| 5 | H – 3 | 13 | 43E | ||||
| 6 | A – 3 | 6 | 20E | ||||
| 7 | ? – 6 | -16 | 69E | ||||
| 8 | A – 3 | -17 | 55E | ||||
| 9 | E – 27 | -23 | 9E | ||||
| 10 | C – 20 | -15 | 4E | ||||
| 11 | C – 8 | -14 | 25W | ||||
| 12 | H – 11 | -13 | 51W | ||||
| 13 | ? – 5 | -24 | 77W | ||||
| 14 | D – 6 | 13 | 75W | ||||
| 15 | J – 2 | 11 | 36W | ||||
| 16 | A – 1 | 12 | 44W | ||||
| 17 | A – 1 | 21 | 72W | ||||
| 18 | E – 16 | 21 | 47W | ||||
| 19 | H – 2 | 24 | 17W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.