Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 March 2001
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)
- 5
- Number of spots (f)
- 30
- Relative number (R)
- 80
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20010321.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 12 | 9 | 40E | 210 | 40E | 8.5 | |
| 2 | FAC – 7 | 15 | 68E | 183 | 68E | 17 | |
| 3 | FAI – 7 | -7 | 73W | 324 | 73W | 13 | |
| 4 | HS – 1 | -13 | 66E | 185 | 66E | ~1 | |
| 5 | HS – 3 | -13 | 78E | 173 | 78E | 4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.