Daily Sunspot Evaluation
Observation Sheet Thursday, 21 April 1994
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)
- 10
- Relative number (R)
- 40
- Observer
- TÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19940421.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSO – 3 | 6 | 03W | 146 ⚠ | 05W | 8 | 62 |
| 2 | HR – 3 | 8 | 64E | 49 | 62E | 1 | 65 |
| 3 | BXO – 4 | -14 | 10E | 103 | 08E | 4 | 63 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.