Daily Sunspot Evaluation
Observation Sheet Thursday, 15 October 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)
- 58
- Relative number (R)
- 98
- Observer
- HM
- Reading
- all checks consistent
- File
- 19871015.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 38 | 21 | 10E | 192 | 08E | 11 | 78 |
| 2 | DAE – 8 | -27 | 39W | 241 | 41W | 8 | 79 |
| 3 | DAE – 10 | -24 | 07W | 209 | 09W | 8 | 81 |
| 4 | HAX – 2 | -31 | 18E | 184 | 16E | 2 | 80 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.