Daily Sunspot Evaluation
Observation Sheet Monday, 18 March 1968
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)
- 3
- Number of spots (f)
- 22
- Relative number (R)
- 52
- Observer
- DK
- Reading
- all checks consistent
- File
- 19680318.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 5 | 29 | 11E | 247 | |||
| 2 | A – 1 | -20 | 03E | 255 | |||
| 3 | G – 16 | 15 | 12W | 270 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.