Daily Sunspot Evaluation
Observation Sheet Tuesday, 14 September 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)
- 6
- Number of spots (f)
- 28
- Relative number (R)
- 88
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19710914.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 13 | 26E | 319 | |||
| 2 | A – 1 | 14 | 55E | 230 ⚠ | |||
| 3 | J – 1 | 5 | 67E | 278 | |||
| 4 | E – 11 | -12 | 70E | 275 | |||
| 5 | ? – 2 | -12 | 77E | 268 | |||
| 6 | D – 12 | -15 | 17W | 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.