Daily Sunspot Evaluation
Observation Sheet Monday, 4 April 1988
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)
- 29
- Relative number (R)
- 69
- Observer
- HM
- Reading
- all checks consistent
- File
- 19880404.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAF – 8 | 20 | 61W | 156 | 63W | 12 | 56 |
| 2 | DAO – 7 | 18 | 65E | 30 | 63E | 13 | 64 |
| 3 | DAO – 7 | -22 | 58W | 153 | 60W | 10 | 60 |
| 4 | CSO – 7 | -22 | 37W | 132 | 39W | 10 | 59 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.