Daily Sunspot Evaluation
Observation Sheet Sunday, 7 March 1999
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)
- 4
- Number of spots (f)
- 31
- Relative number (R)
- 71
- Observer
- HE
- Reading
- all checks consistent
- File
- 19990307.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ERO – 9 | 16 | 67W | 73 | 70W | 14 | |
| 2 | ORO – 10 | -13 | 09W | 15 | 12W | 4.5 | |
| 3 | AX – 4 | -26 | 02W | 8 | 05W | 2 | |
| 4 | HS – 8 | -30 | 03E | 3 | 00 | 4.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.