Daily Sunspot Evaluation
Observation Sheet Tuesday, 31 March 1959
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)
- 15
- Number of spots (f)
- 160
- Relative number (R)
- 310
- Observer
- MH
- Reading
- all checks consistent
- File
- 19590331.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 51 | 4 | 8E | ||||
| 2 | B – 4 | -4 | 2E | ||||
| 3 | A – 4 | 16 | 55E | ||||
| 4 | J – 1 | -10 | 37E | ||||
| 5 | J – 1 | -33 | 62W | ||||
| 6 | A – 2 | -12 | 11W | ||||
| 7 | C – 8 | -8 | 53W | ||||
| 8 | B – 4 | -2 | 28W | ||||
| 9 | A – 5 | -4 | 16W | ||||
| 10 | ? – 1 | 24 | 70W | ||||
| 11 | ? – 2 | 24 | 59W | ||||
| 12 | H – 4 | 8 | 21W | ||||
| 13 | B – 16 | 20 | 36W | ||||
| 14 | B – 9 | 12 | 12W | ||||
| 15 | F – 48 | 25 | 3W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.