Daily Sunspot Evaluation
Observation Sheet Wednesday, 18 April 1984
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)
- 35
- Relative number (R)
- 75
- Observer
- HG
- Reading
- all checks consistent
- File
- 19840418.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BRO – 4 | 5 | 38W | 153 | 40W | 325 | 75 |
| 2 | HKX – 16 | 8 | 28W | 143 | 30W | 8 | 72 |
| 3 | EKO – 14 | -17 | 33E | 82 | 31E | 11 | 73 |
| 4 | ? – 1 | -11 | 75E | 40 | 73E | 3 | 74 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.