Daily Sunspot Evaluation
Observation Sheet Thursday, 18 March 2004
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)
- 13
- Relative number (R)
- 43
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20040318.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 4 | -18 | 44W | 269 | 45W | ~4.5 | 41 |
| 2 | DAO – 8 | -4 | 47E | 176 | 46E | ~9 | 40 |
| 3 | HS – 1 | -1 | 69E | 156 | 68E | ~2 | 42 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.