Daily Sunspot Evaluation
Observation Sheet Wednesday, 19 April 1972
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)
- 4
- Number of spots (f)
- 43
- Relative number (R)
- 83
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720419.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 18 | 62E | 290 | |||
| 2 | E – 35 | -10 | 28E | 324 | |||
| 3 | B – 6 | -7 | 15W | 7 | |||
| 4 | J – 1 | 8 | 36W | 28 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.