Daily Sunspot Evaluation
Observation Sheet Saturday, 7 April 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)
- 8
- Number of spots (f)
- 68
- Relative number (R)
- 148
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20010407.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 2 | 10 | 60W | 89 | 63W | ~3.5 | |
| 2 | HA – 2 | 26 | 52W | 81 | 55W | ~3.5 | |
| 3 | AX – 1 | 7 | 40W | 69 | 43W | - | |
| 4 | DAI – 12 | 26 | 42E | 347 | 39E | ~10 | |
| 5 | CAO – 3 | -15 | 32W | 61 | 35W | ~4.5 | |
| 6 | DAI – 22 | -9 | 10E | 19 | 07E | 8 | |
| 7 | EKC – 23 | -21 | 30E | 359 | 27E | 11 | |
| 8 | HA – 3 | -7 | 60E | 329 | 57E | 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.