Daily Sunspot Evaluation
Observation Sheet Tuesday, 13 April 1993
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)
- 5
- Relative number (R)
- 25
- Observer
- HE
- Reading
- all checks consistent
- File
- 19930413.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 5 | 82W | 78 | 84W | 7 | 80 |
| 2 | ? – 3 | -9 | 79W | 75 | 81W | - | 86 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.