Daily Sunspot Evaluation
Observation Sheet Tuesday, 23 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)
- 5
- Number of spots (f)
- 29
- Relative number (R)
- 79
- Observer
- FA
- Reading
- all checks consistent
- File
- 19710323.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -9 | 12E | 127 | |||
| 2 | ? – 5 | -14 | 76E | 63 | |||
| 3 | D – 17 | -15 | 13W | 152 | |||
| 4 | A – 1 | -5 | 76W | 215 | |||
| 5 | A – 5 | 19 | 12W | 151 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.