Daily Sunspot Evaluation
Observation Sheet Saturday, 18 April 1998
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)
- 2
- Number of spots (f)
- 14
- Relative number (R)
- 34
- Observer
- MB
- Reading
- all checks consistent
- File
- 19980418.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 2 | 80 | 50W | 359 | 52W | 02 | |
| 2 | DAI – 12 | 19 | 04W | 313 | 06W | 08 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.