Daily Sunspot Evaluation
Observation Sheet Saturday, 1 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)
- 5
- Number of spots (f)
- 16
- Relative number (R)
- 66
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720401.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 0 | 22E | 208 | |||
| 2 | G – 4 | -7 | 38E | 192 | |||
| 3 | B – 8 | -10 | 29E | 201 | |||
| 4 | A – 1 | -27 | 20W | 250 | |||
| 5 | A – 2 | -16 | 40W | 270 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.