Daily Sunspot Evaluation
Observation Sheet Friday, 31 March 1989
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)
- 9
- Number of spots (f)
- 45
- Relative number (R)
- 135
- Observer
- HÇ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19890331.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 14 | 46W | 52 ⚠ | 49W | 1.5 | |
| 2 | BXI – 5 | 22 | 19W | 31 | 22W | 4.0 | |
| 3 | AX – 1 | 24 | 30E | 342 | 27E | - | |
| 4 | BXO – 4 | 18 | 37E | 335 | 34E | 5.0 | |
| 5 | AX – 1 | 36 | 65E | 307 | 62E | - | |
| 6 | CAI – 7 | -25 | 56W | 68 | 59W | 11.5 | |
| 7 | BXO – 7 | -27 | 20E | 352 | 17E | 4.0 | |
| 8 | EKI – 16 | -20 | 64E | 308 | 61E | 19.0 | |
| 9 | BXO – 3 | -27 | 69E | 303 | 66E | 6.0 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.