Daily Sunspot Evaluation
Observation Sheet Thursday, 4 March 1971
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)
- 23
- Relative number (R)
- 103
- Observer
- SK
- Reading
- all checks consistent
- File
- 19710304.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 15 | 32E | 357 | |||
| 2 | B – 4 | -2 | 10E | 19 | |||
| 3 | J – 1 | -11 | 46E | 343 | |||
| 4 | G – 4 | -15 | 30W | 59 | |||
| 5 | H – 7 | 7 | 47W | 76 | |||
| 6 | A – 1 | 23 | 23W | 52 | |||
| 7 | J – 1 | 27 | 17W | 46 | |||
| 8 | J – 2 | 9 | 06W | 35 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.