Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 March 1990
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)
- 14
- Number of spots (f)
- 101
- Relative number (R)
- 241
- Observer
- HÇ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19900320.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAI – 6 | 63 | 60W | 76 | 59W | 12 | 108 |
| 2 | AX – 1 | 11 | 16W | 82 ⚠ | 15W | - | 127 |
| 3 | AX – 1 | 45 | 15W | 81 ⚠ | 14W | 0.5 | 116 |
| 4 | AX – 3 | 6 | 11W | 27 | 10W | 2 | 113 |
| 5 | CAI – 23 | 17 | 12E | 4 | 13E | 12 | 117 |
| 6 | AR – 2 | 16 | 58E | 318 | 59E | 3 | 125 |
| 7 | AX – 2 | -31 | 19W | 35 | 18W | 1 | 121 |
| 8 | AX – 1 | -18 | 03W | 19 | 02W | 0.5 | 119 |
| 9 | FHC – 27 | -34 | 01E | 15 | 02E | 24.5 | 114 |
| 10 | AR – 1 | -10 | 29E | 347 | 30E | 1 | 119 |
| 11 | BXI – 8 | -13 | 45E | 331 | 46E | 5 | 123 |
| 12 | FAI – 18 | -32 | 51E | 325 | 52E | 17 | 122 |
| 13 | CKI – 5 | -17 | 60E | 316 | 61E | 8 | 121 |
| 14 | EAO – 3 | -8 | 75E | 301 | 76E | 12 | 126 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.