Daily Sunspot Evaluation
Observation Sheet Saturday, 30 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)
- 43
- Relative number (R)
- 163
- Observer
- MH
- Reading
- all checks consistent
- File
- 19570330.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | ||||||
| 2 | E – 12 | ||||||
| 3 | J – 1 | ||||||
| 4 | C – 5 | ||||||
| 5 | B – 2 | ||||||
| 6 | A – 1 | ||||||
| 7 | A – 1 | ||||||
| 8 | A – 2 | ||||||
| 9 | A – 1 | ||||||
| 10 | A – 1 | ||||||
| 11 | D – 9 | ||||||
| 12 | B – 6 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.