Daily Sunspot Evaluation
Observation Sheet Friday, 19 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)
- 22
- Relative number (R)
- 52
- Observer
- FA
- Reading
- all checks consistent
- File
- 19740419.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | -8 | 20E | 57 | |||
| 2 | D – 14 | -13 | 48W | 125 | |||
| 3 | D – 7 | -9 | 42W | 119 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.