Daily Sunspot Evaluation
Observation Sheet Thursday, 11 April 1974
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)
- 3
- Number of spots (f)
- 65
- Relative number (R)
- 95
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740411.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 5 | -16 | 19E | 163 | |||
| 2 | E – 49 | -13 | 02W | 184 | |||
| 3 | C – 11 | -5 | 34W | 216 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.