Daily Sunspot Evaluation
Observation Sheet Thursday, 13 March 1958
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)
- 8
- Number of spots (f)
- 85
- Relative number (R)
- 165
- Observer
- WG
- Reading
- all checks consistent
- File
- 19580313.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 32 | 13 | 3E | ||||
| 2 | C – 3 | 16 | 56E | ||||
| 3 | E – 10 | 12 | 71E | ||||
| 4 | B – 5 | -12 | 12W | ||||
| 5 | C – 3 | -17 | 76W | ||||
| 6 | C – 5 | 22 | 57W | ||||
| 7 | ? – 2 | 32 | 73W | ||||
| 8 | E – 25 | 13 | 15W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.