Daily Sunspot Evaluation
Observation Sheet Friday, 18 March 1966
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)
- 49
- Relative number (R)
- 69
- Observer
- LT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19660318.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 41 | 18 | 390W | 223 ⚠ | |||
| 2 | C – 8 | 28 | 42E | 142 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.