Daily Sunspot Evaluation
Observation Sheet Wednesday, 18 February 1998
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)
- 20
- Relative number (R)
- 60
- Observer
- SB0
- Reading
- all checks consistent
- File
- 19980218.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSO – 3 | 21 | 08E | 359 | 05E | 6 | 31 21 |
| 2 | AX – 2 | 23 | 36E | 331 | 33E | 1.5 | 72 28 |
| 3 | EKO – 13 | -25 | 26W | 33 | 29W | 13 | 26 24 |
| 4 | HS – 2 | -22 | 05W | 12 | 08W | 1.5 | 28 25 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.