Daily Sunspot Evaluation
Observation Sheet Friday, 10 April 1987
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)
- 34
- Relative number (R)
- 74
- Observer
- HG
- Reading
- all checks consistent
- File
- 19870410.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKZ – 10 | -23 | 11W | 179 | 13W | 13 | 15 |
| 2 | EKZ – 18 | -32 | 32E | 136 | 30E | 13 | 16 |
| 3 | DAZ – 4 | -6 | 43E | 125 | 41E | 3.5 | 18 |
| 4 | BRX – 2 | -7 | 53E | 115 | 51E | 1.5 | 19 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.