Daily Sunspot Evaluation
Observation Sheet Thursday, 7 March 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)
- 12
- Number of spots (f)
- 57
- Relative number (R)
- 177
- Observer
- AK
- Reading
- all checks consistent
- File
- 19570307.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 17 | 65E | ||||
| 2 | A – 2 | -8 | 55E | ||||
| 3 | ? – 13 | -17 | 79E | ||||
| 4 | B – 3 | -19 | 60E | ||||
| 5 | C – 7 | -24 | 63E | ||||
| 6 | C – 9 | -28 | 37E | ||||
| 7 | A – 1 | -40 | 35E | ||||
| 8 | H – 6 | -19 | 6W | ||||
| 9 | A – 2 | -12 | 17W | ||||
| 10 | D – 4 | -14 | 54W | ||||
| 11 | B – 5 | 21 | 59W | ||||
| 12 | G – 4 | 30 | 22W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.